Science 10 unit 2 chapter 1 notes.notebook · Science 10 unit 2 chapter 1 notes.notebook 6 April 27, 2015 Examples: 1) A huge ocean wave travels a distance of 4.0 Χ 106 m in 3.6

Science 10 unit 2 chapter 1 notes.notebook

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Physics


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1.1 Motion

Motion refers to the movement of an object from a reference point. Motion is a change in position whether it be a change in direction or a change in distance from a reference point.

How can we tell that motion has occured?


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Uniform Motion

Uniform Motion is a type of motion that involves an object that is travelling at a constant rate of motion in a straight line.

How do we know that this object is uniformly in motion?

What are some other examples?

Was the student walking down the hallway exhibiting uniform motion?


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ThinkPairShare:1. How do we measure average speed?

2. What are some units we use to measure average speed?


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Average Speed

Average speed involves uniform motion traveling a distance in a specified time.

Formula:

v = Δd Δt

v = speedΔd = change in distance (final initial)Δt = change in time (final initial)


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Examples:1) A huge ocean wave travels a distance of 4.0 Χ 106 m in 3.6 Χ 104 s. Calculate the average speed of the wave.

2) A Concorde airplane could fly at an average speed of 694 m/s. Calculate how long it would have taken the Concorde to fly around the world, which is approximately 4.00 Χ 107 m


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3) An electric train is traveling at an average speed of 24.84 km/h for 4.0 s. Calculate the distance traveled by the train.


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DistanceTime Graphs

Slope can be calculated on a graph with the following equation.

slope = (y2y1) (x2x1)

Example: Draw a distancetime graph and determine the slope of the line.

What does slope represent on the graph?


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Science 10: April 17thTopic:

Scalar and Vector Quantities and Velocity Plan for the day:

1. Quick review: Partner A/B2. Lesson on graphing speed and velocity3. Workbook #3 and 4


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Quick Review! Partner A/BPartner A) If you are driving at an average speed of 90km/h and you are driving 450km to Edmonton, how long will it take you to get there, assuming you do not make stops?

Partner B) If you have an appointment across town 10km away and you have 3 minutes to get there, how fast would you have to drive, on average? Can you make it on time?


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SpeedTime Graphs

A speedtime graph shows the relationship between speed and time. Speed is found on the yaxis and time is found on the xaxis.

The data provided was collected for an object travelling at a uniform speed. Draw a speedtime graph and answer the following questions.

a) Determine the slopeof the line. Explain whatkind of motion is occurring?

b) Determine the area under the line. What would this value represent?

Area = length X width


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Describe the following motions.

Section Questions:Page 135 #119

constant speedslowpositive

constant speedfastpositive

constant speedslownegative

constant speedfastnegative


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A woman drives to West Edmonton Mall, located 400 000 m from her home. On the way there she averages 80 km/h but gets a speeding ticket upon her arrival. How long did it take her to get to the mall?


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1.2 Velocity

Scalars are quantities which are fully described by a magnitude (number) alone. Indicates “how much”.

eg : distance , mass , time , volume, etc

Vectors are quantities which are fully described by both a magnitude and a direction. Indicates “how much” and in what direction. A vector quantity is represented with an arrow above the symbol.

eg: displacement , velocity , force ,acceleration etc.

Is speed a scalar or vector quantity?


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Displacement vs. Distance

Distance refers to measurement of the change in distance of an object moving from a starting reference point. It is a scalar quantity.

Δd

Displacement refers to a measurement of the change in distance and the direction or change in position of an object from a reference point. It is a vector quantity.

Δd

With the following picture, calculate the distance and displacement of the person.


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Velocity

Velocity describes both the rate of motion and the direction of the object.

v = Δd Δt

Δd = change in displacement (final initial)Δt = change in time (final initial)v = velocity

IMPORTANT NOTE:


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Examples:1) A student walks 10.0 m [E] in 7.00 s. Then he walks another 12.0 m [E] in 8.00 s. Determine the average velocity of the student.

2) A boat travels at a velocity of 8.00 m/s [N] for 14.0 s. What is the displacement of the boat?


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3) An airplane flying at a velocity of 900 km/h [W] travels 400 km west. How long will the plane be in flight?

4) How long would it take us to reach Valleyview if we were traveling at 22.2 m/s? Valleyview is 111 km away. Show your answer in hours.


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Science 10: April 20thTopic:

Uniform motion lab Plan for the day:

1. Review2. Uniform motion inquiry lab


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Science 10: April 21stTopic:

Uniform Motion Plan for the day:

1. Review velocity and speed2. Finish velocity graphs lesson 3. Work on uniform motion inquiry lab


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You send a small toy car down a track and it takes 5.0s to go 3m. How fast is the car going on average?

If that car then goes at the same speed down the rest of the track and it takes 4.5s, how far did it go?

How is measuring velocity different from measuring speed?

REVIEW! Answer on your own, please.


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Velocity and PositionTime Graphs

Draw a positiontime graph for the following data to determine the average velocity between t = 0.0 s and t = 10.0 s.


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Velocity and VelocityTime Graphs

Draw a velocitytime graph for the following data to determine the displacement of the boat.


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Explain what is happening in the following graphs.

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Science 10 unit 2 chapter 1 notes.notebook · Science 10 unit 2 chapter 1 notes.notebook 6 April 27, 2015 Examples: 1) A huge ocean wave travels a distance of 4.0 Χ 106 m in 3.6