Name: __________________________

Date: ________________ Period: ___

Speed Practice Problems

Solve the following speed problems. Do not forget equation, units & your work. Round answers to 100ths place

1. What is the average speed of an elephant that travels 160 km in 2 hours?

Equation: _____________________

Work: _____________________

Answer: _____________________

2. What is the average speed of a cheetah that travels 200 km in 2 hours?

Equation: _____________________

Work: _____________________

Answer: _____________________

3. If you ran at an average speed of 1.6 m/s, how long would it take to cross a road that is 20 m wide?

Use Time = Distance/Speed b/c your solving for Time.

Equation: _____________________

Work: _____________________

Answer: _____________________

4. Which has a greater speed, a heron that travels 600 m in 60 seconds or a duck that travels 60 m in 5

seconds? Circle the bold word Duck or Heron for the winner.

Heron: Duck:

Equation: _____________________ Equation: _____________________

Work: _____________________ Work: _____________________

Answer: _____________________ Answer: _____________________

5. Create 3 word problems and solve them below. Then, give your 3 word problems to your partner to

copy and solve on the back of this sheet. Don’t forget equation, work and answer!

Problem #1: _________________________________________________________________________

____________________________________________________________________________________

Problem #2: _________________________________________________________________________

____________________________________________________________________________________

Problem #3: _________________________________________________________________________

____________________________________________________________________________________

Name: ___________________________________________________ Date: _________________ Per: ___

SPEED AND ACCELERATION PRACTICE PROBLEMS

For each question: Write down the equation, show your work, and write the answer with the correct units. Graphs: Be sure to provide a title, use a ruler, and label the axes with both a title and units. Example: Time (s)

1a) An Osprey was sitting on a telephone wire above a creek at the San Elijo lagoon in Encinitas, when it saw a large

mullet (a fish) swim by. It then flew 27.0 m in 3.20 seconds in order to catch the fish. What was the Osprey’s average

speed? Equation: ______________

Work: ______________

Answer: ______________ 1b) For a moment, the bird was sitting still in the water with the fish in its talons. It then flew away reaching a speed of

20.5 m/s in 3.4 seconds. What was its acceleration? Make sure to show your work and the correct units.

Equation: ______________

Work: ______________

Answer: ______________ 1c) NOT HOMEWORK: Graph the acceleration of the Osprey. Remember to always put time on the x-axis and speed

on the y-axis and don’t forget the units. 1d) What would the speed of the Osprey be if it flew for 5.0 seconds? Show your work and don’t forget units. Equation: ______________

Work: ______________

Answer: ______________ 2a) A balloon is carried by the wind at a speed of 16.37 km/hr. How far did the balloon go in one day? Make sure to

show your work and the correct units.

Work: ______________

Answer: ______________

2b)While the balloon was floating away, a gust of wind increased its speed from 16.9km/hr to 23.6km/hr in 4 seconds.

What was the balloon’s average acceleration?

Equation: ______________

Work: ______________

Answer: ______________ 2c) NOT HOMEWORK: Graph the acceleration of the balloon. Remember to always put time on the x-axis and speed

on the y-axis and don’t forget the units.

2d) What would the speed of the balloon be if it flew for 5.0 seconds? Make sure to show your work and the correct

units

Work: ______________

Answer: ______________

3a) A Red-Tailed Hawk was hovering in the sky at 0.0 m/s, when it saw a garter snake. It then flew 50.0 m in 5.0 seconds.

What was the bird’s average speed? Equation: ______________

Work: ______________

Answer: ______________

3b) Within 1.5 seconds, the hawk decreased its speed from the above problem to a dead stop when it caught the snake.

What was the bird’s acceleration? Equation: ______________

Work: ______________

Answer: ______________

3c) NOT HOMEWORK: Graph the acceleration of the bird. Remember to always put time on the x-axis and speed on

the y-axis and don’t forget the units. 3d) What kind of acceleration is this an example of, increasing, decreasing, or changing direction? __________________________

4a) A car is sitting at a stoplight. Once the light turns green it takes the car 4 seconds to cross the intersection. At the

point it crosses the intersection it is traveling at a speed of 0.360km/s? What was the acceleration of the car from the time

it was stopped to the time it finished crossing the intersection? Equation: ______________

Work: ______________

Answer: ______________

4b) NOT HOMEWORK: Graph the acceleration of the car. 4c) What would the speed of the car be if it traveled for 5.0 seconds?

Work: _______________

Answer: _______________

4d) Describe the acceleration graph of a car which is sitting at a red light in a complete sentence. _________________________________________________________________________________________________

__________________________________________________________________________________________________

Name: __________________________

Date: _________________ Period: ___

Average Speed

Purpose:

__________________________________________________________________________________________

Hypothesis:

__________________________________________________________________________________________

__________________________________________________________________________________________

__________________________________________________________________________________________

Materials:

_______________________ _________________________

_______________________ _________________________

_______________________ _________________________

_______________________ _________________________

Procedure: See Lab Instructions

Data:

__________________________________

Marble Mass ( )

Glass

Steel

_______________________________________

Distance ( ) Time #1

( )

Time #2

( )

Time #3

( )

Average

Time ( )

Show Work

for Speed

Speed

( )

.5

1.0

1.5

2.0

Average Speed for Glass Marble

Equation: _________________ Work: _________________ Answer: _________________

_______________________________________

Distance (m) Time #1

(s)

Time #2

(s)

Time #3

(s)

Average

Time (s)

Show Work

for Speed

Speed

(m/s)

.5

1.0

1.5

2.0

Average Speed for Steel Marble

Equation: _________________ Work: _________________ Answer: _________________

__________________________________

Group # Glass Marble

( )

Steel Marble

( )

Group # Glass Marble

( )

Steel Marble

( )

1 9

2 10

3 11

4 12

5 13

6 14

7 15

8 16

Analysis Questions:

1. Compare the terms: Speed, Average Speed and Instantaneous Speed.

____________________________________________________________________________________

____________________________________________________________________________________

____________________________________________________________________________________

2. What is the equation for Speed? For Average Speed?

____________________________________________________________________________________

____________________________________________________________________________________

3. What are the units for speed in this lab? What are two other possible units that can be used for speed?

____________________________________________________________________________________

____________________________________________________________________________________

4. How does Mass affect Speed?

____________________________________________________________________________________

____________________________________________________________________________________

Conclusion:

See attached conclusion

Name: _______________________________

Date: _______________________ Period:___

Eyeball Motion

PURPOSE: _________________________________________________________________________________________

PROBLEM:

_________________________________________________________________________________________

_________________________________________________________________________________________

HYPOTHESIS:

_________________________________________________________________________________________

_________________________________________________________________________________________

_________________________________________________________________________________________

MATERIALS: __________________________

__________________________

__________________________

__________________________

__________________________

__________________________

PROCEDURES: See Lab Instructions

DATA:

DATA TABLE 1: _________________________________

Distance

( )

Time 1

( )

Time 2

( )

Time 3

( )

Average

Time ( )

Work Speed

( )

0.25

0.50

0.75

1

DATA TABLE 2: _________________________________

Distance

( )

Time 1

( )

Time 2

( )

Time 3

( )

Average

Time ( )

Work Speed

( )

0.25

0.50

0.75

1

ANALYSIS QUESTIONS/GRAPH: Use Complete Sentences!

1. a) What two values must we know to calculate speed? b) Write the equation.

_______________________________________________________________________________________

_______________________________________________________________________________________

2. a) What three values must we know to calculate velocity? b) Write the equation.

_______________________________________________________________________________________

_______________________________________________________________________________________

3. How is speed different than velocity?

_______________________________________________________________________________________

_______________________________________________________________________________________

_______________________________________________________________________________________

4. What happens to the speed of the ball as it travels over the entire distance for the one book ramp set up?

The two book ramp?

_______________________________________________________________________________________

_______________________________________________________________________________________

_______________________________________________________________________________________

5. Calculate the slope of the line for the one book ramp between .25m and .5m. Include the equation and

units.

_______________________________________________________________________________________

_______________________________________________________________________________________

_______________________________________________________________________________________

6. Calculate the slope of the line for the two book ramp between .25m and .5m. Include the equation and

units.

_______________________________________________________________________________________

_______________________________________________________________________________________

_______________________________________________________________________________________

7. You are going to graph the data you collected. What are the four coordinates for Data table #1 and what

are the four coordinates for Data Table #2?

One Book Ramp Coordinates: ___________, ____________, _____________, _____________

Two Book Ramp Coordinates: ___________, ____________, _____________, _____________

GRAPH: See attached Graph

CONCLUSION: See attached Conclusion

Part I: Analyzing Speed Graphs

Directions: Use the Distance vs. Time graph below to answer questions #1-7

1. The slope of a distance vs. time graph tells you the ________________________.

2. Solve for the slope of the linear line between 0 and 6 seconds. Use coordinates: (3,5) and (6,10)

Equation for Slope: _______________________

Work: _______________________

Answer _______________________ (don’t forget units!)

3. What is the speed of the object between 0 and 6 seconds? ___________________

4. What is the distance of the object at:

6 seconds? _____ at 7 s? _____ 8 s? _____ 9 s? ______ 10 s? _____ 11 s? _____

5. Based on #4, what do you think happened to the motion of the object between 6 seconds and 11

seconds? The motion of the object…____________________________________________.

6. If the line was curved upwards between 0 and 6 seconds, rather than showing a linear line, what could

you say about the speed of the object? ________________________________________________.

7. What is happening to the speed of the object after 11 seconds? ______________________________.

Use the space below to draw a sketch of a graph that show the following: (sketch means no numbers or scale

required but make sure you label the x with Time (s) and y with Distance (m) )

a. An object traveling at a constant speed.

y

x

b. An object speeding up (accelerating)

y

x

c. An object that was traveling at a constant speed but then stopped for several seconds.

y

x

Now, create a Distance (m) vs. Time (s) graph in the box below. Don’t forget to label your x with Time (s) and

the y axis with Distance (m). This graph will have numbers and a scale. Your X-axis will need to have a scale

through 12 seconds. Pick any scale for distance. a. Draw a line between 0 and 3 seconds that represents a constant speed.

b. Between 3 and 8 seconds, have the line show that the object has stopped moving.

c. Now, show the object accelerating again at a constant rate from 8 seconds through 11 seconds.

y

x

Part II: Analyzing Acceleration Graphs

Directions: Use the Speed vs. Time graph below to answer questions #1-8

Acceleration of the Night Hawk Dragon

y

6

5

Speed

(m/s) 4

3

2

1

x

o 2 4 6 8 10 12 14 16 18 20 22

Time (s)

1. The slope of a speed vs. time graph tells you the ________________________.

2. Solve for the slope of the linear line between 0 and 8 seconds. (Hint: Remember, pick any two coordinates)

Equation for Slope: _______________________

Work: _______________________

Answer _______________________ (don’t forget units!)

3. What is the Acceleration of the object between 0 and 8 seconds? ___________________

4. Could you say that the Dragon is accelerating at a constant rate between 0 and 8 seconds? ______ yes/no

5. Hopefully, you said Yes to #4. Why would you consider the acceleration constant? The line is

_________________.

6. What is the speed of the object at:

8 seconds? _____ at 10 s? _____ 12 s? _____ 14 s? ______ 16 s?

7. Based on #5, what do you think happened to the motion of the Dragon between 8 seconds and 16

seconds? The dragon is traveling at a _____________________ speed of _____ m/s.

8. What happens to the dragon’s speed between 16 and 20 seconds? ______________________________.

9. What happens to the dragon’s speed after 20 seconds? _______________________________________.

Use the space below to draw a sketch of a graph that show the following: (sketch means no numbers or scale

required but make sure you label the x with Time (s) and y with Speed (y) )

a. An object traveling at a constant speed.

y

x

b. An object speeding up at a constant rate (accelerating)

y

x

a. An object slowing down at a constant rate (decelerating)

y

x

b. An object that was accelerating at a changing rate

y

x

Name: ________________________

Date: ______________ Period: ____

My Crossword! Title: ___________________________ Directions:

Part I: Making the Answer Key

1. Write the vocabulary words. (some will be horizontal, others will be vertical)

2. Make sure the words fit together like a real crossword puzzle.

3. Fill in numbers for each word.

4. Write the clues/definitions for the words below. Makes sure they correspond with the number and whether they are across or

down cues.

Part II: Blank Crossword

1. Using this sheets grids as a guide; make a blank crossword that responds to the answer key you just made.

2. Exchange your blank crossword with a peer and complete each others crossword.

Across Clues: Down Clues:

Name: _________________________________________________________ Date: __________________________ Period: ___

Marvelous Motion! (Chapter 9 Review)

Online Computer Lab

Directions: Go to http://www.physics4kids.com/ and answer the following questions.

Part I: Click on “Motion” written in orange/yellow on the top right. Now, click on “Velocity” written in red on the

right hand side.

1. How are velocity and speed similar? ______________________________________. How are they different?

_______________________________________.

2. Click on the underlined word “vector”. What is a vector? ____________________________________________

___________________________________________________________________________________________.

3. Draw a picture of a vector. Label the direction and the magnitude (size/strength)

4. You need both ___________________ and ___________________ to have a vector.

5. What is an example of vectors in real life? ________________________________________________________.

6. Click the back button to go back to the most recent page on velocity. What is the equation for average speed?

Average speed = _______________ divided by ________________

7. Velocity is the rate of motion in a specific ____________________. Velocity can be constant, or it can

change. Speed with a ____________________ is velocity!

8. Velocity is a vector measurement because it has an __________________ and a ________________.

Speed is only an __________________. Speed doesn't tell the whole story to a physicist.

9. What is instantaneous velocity? _________________________________________________________.

10. When velocity changes, the word ___________________________ is used.

11. Is acceleration a vector? ______________. Why? __________________________________________.

12. What is the difference between acceleration and deceleration? _________________________________

____________________________________________________________________________________

13. Draw the graph to represent acceleration and deceleration. Don’t forget to label your x and y axis.

14. What is instantaneous acceleration? ______________________________________________________

___________________________________________________________________________________.

15. What is an example of when acceleration is constant? ________________________________________.

Part II: Go to http://www.physicsclassroom.com/mmedia/kinema/avd.cfm and answer the questions. 16. Draw the animation in three parts. The first part should show the hot wheels car with a positive acceleration, the

second part should show the car slowing down, and the third part should show the car stopped. You must label

both the velocity vector and the acceleration vector to demonstrate the change in acceleration. You will have to

watch the animation several times to see the details that are required for these drawings.

17. What is the rule of thumb?? ____________________________________________________________________

___________________________________________________________________________________________

18. Why is the car accelerating the entire time?? (Hint: think of the definition of acceleration)

___________________________________________________________________________________________

___________________________________________________________________________________________.

Part III: Go to http://www.physicsclassroom.com/Class/1DKin/U1L1d.cfm and answer the following questions.

19. Read through speed and velocity and then click on the animation. This will bring you to a page that is titled

“Average vs. Instantaneous speed”. What is the difference between average and instantaneous speed?

___________________________________________________________________________________________

___________________________________________________________________________________________.

20. Click on the back button to take you back to the recent page. Scroll down to “Average speed vs. Instantaneous

Speed”. Find the two data tables. The first data table is for “Constant speed” and the second graph is for

“Changing speed”. Make a small graph for each data table in this section.

21. Find the slope for the first graph. Remember, pick two coordinates and use the rise/run equation.

Coordinate #1: _______________, Coordinate #2: __________________

Work: _______________________

Answer: _______________________

22. Scroll all the way to the bottom of the website and take the two quiz questions. Show your work and answer for

each one. Read the instructions for the questions carefully. Don’t worry about finding average velocity.

Question #1: The Skier, AVERAGE SPEED

Work: _______________________

Answer: _______________________

Question #2: The Football Player, AVERAGE SPEED

Work: _______________________

Answer: _______________________

Part IV: Go to http://teachers.sduhsd.net/mboman/study%20stacks.htm and click on Chapter 9 “Motion and

Energy”. This website can also be accessed through Mrs. Boman’s website, under “additional links” and then

“Study stacks”.

23. Click on the “Crossword” option and complete the crossword. Write the answers to the questions below.

Down:

2. __________________________

3. __________________________

5. __________________________

6. __________________________

Across:

1.__________________________

4.__________________________

Finished early? Play on the Study Stacks site. Try Hangman or Matching!

CHAPTER 9 STUDY GUIDE Answer the following questions on a separate sheet of paper. Answer each part of each question!!

SHOW ALL WORK & EQUATIONS for full homework credit.

1. Compare the terms, distance and displacement. How do we know if an object is in motion?

2. Compare the terms average speed and instantaneous speed. What formula do we use to calculate speed?

3. If a car drives 700 meters in 10 seconds, what is its speed? Write the equation and answer.

4. If Superman flies 60 m in 1 second and then flies 100 m the next second, what is average speed?

5. On a distance vs. time graph, which car would have a steeper slope: a car that drives 100 m in 5 seconds or a car that

drives 80 m in 5 seconds?

6. The slope of a distance vs. time graph also tells you the _________ of the object.

7. What does a linear line on a distance vs. time graph mean?

8. What does a flat line on a distance vs. time graph mean?

9. Calculate the slope of both objects graphed below. What is this objects speed? Don’t forget equation & units.

10. What word do we use to describe how an objects speed changes over time?

11. What are three examples of ways in which a car can accelerate?

12. What is the equation for acceleration?

13. A car is stopped at a red light. Once the light turns green it reaches a speed of 8 m/s in 2 seconds. What is this cars

acceleration? Don’t forget equation and units.

14. Graph the acceleration of the car in the previous problem on a speed vs. time graph. (Label axes with correct

title and units).

15. You are taking a jog on the beach at a speed of 4 m/s when you see a $100 bill on sand and you quickly stop to pick it

up. It takes you 1.5 seconds to stop completely. What is your acceleration?

16. If your acceleration was -2.67 m/s2, how fast were you going after 1 second?

17. If you have a sports car that goes from 0 to 60 mph in 3 seconds, what is your cars acceleration?

18. If your car accelerates at a rate of 20 mph/s, how fast will you be going after 6 seconds?

19. Sketch a graph of a car that goes from 0 to 20 m/s in 1 second, travels at 20 m/s for the next 3 seconds, and then slows

down to 10 m/s in the next second.

20. What two pieces of information do we need to have in order to describe the velocity of an object?

21. What is the acceleration of a car that travels at 20 m/s during its entire trip?

22. You accelerate from 3 m/s to 5 m/s in 4 seconds. What is your acceleration?

23. What is the SI unit for weight? What is the SI unit for mass?

24. What does deceleration mean?

MORE STUDY TIPS!!!

Re-read your Journal entries.

Look over your notes (PowerPoints), labs, and activities for the unit. Do extra credit!

Use your notes and textbook to clarify anything. Use www.pearsonsuccessnet.com or www.phschool.com for review activities