Chapter 1 Clickers © 2014 Pearson Education, Inc. Kinematics: Motion in One Dimension Prepared by Dedra Demaree, Georgetown University

Chapter 1 Clickers

© 2014 Pearson Education, Inc.

Kinematics:Motionin One Dimension

Prepared by

Dedra Demaree, Georgetown University


The object represented by the following motion diagram is:

a) Slowing down.

b) Moving to the right.

c) Moving with constant velocity.

d) Speeding up.


The object represented by the following motion diagram is:

a) Slowing down.

b) Moving to the right.

c) Moving with constant velocity.

d) Speeding up.


What can we conclude about the motion of the two objects represented by the following motion

diagrams?

a) Both objects are moving at constant speed.

b) Object 2 is moving more slowly than object 1.

c) The objects could be moving either left or right.

d) We can conclude all of the above.


What can we conclude about the motion of the two objects represented by the following motion

diagrams?

a) Both objects are moving at constant speed.

b) Object 2 is moving more slowly than object 1.

c) The objects could be moving either left or right.

d) We can conclude all of the above.


Given the following motion diagram, what is the direction of the change in the velocity vector?

a) The change in velocity vector is to the left.

b) The change in velocity vector is to the right.

c) The change in velocity vector is zero because the velocity is constant.

d) It is impossible to determine the direction of the change in velocity vector from the given information.


Given the following motion diagram, what is the direction of the change in the velocity vector?

a) The change in velocity vector is to the left.

b) The change in velocity vector is to the right.

c) The change in velocity vector is zero because the velocity is constant.

d) It is impossible to determine the direction of the change in velocity vector from the given information.


If the velocity change arrows are all the same,what can we conclude?

a) The object is speeding up steadily.

b) The object is slowing down steadily.

c) The object is moving at constant speed.

d) The object cannot be moving.

e) Either A or B could be possible.


If the velocity change arrows are all the same,what can we conclude?




d) The object cannot be moving.

e) Either A or B could be possible.


If the velocity change arrows point in the opposite direction as the velocity arrows, what can we

conclude?




d) None of the above.


If the velocity change arrows point in the opposite direction as the velocity arrows, what can we

conclude?




d) None of the above.


Which information about a moving object can we NOT extract from a motion diagram?

a) What the object was doing before the first dot of the motion diagram

b) Where the object is at specific times

c) What the object's velocity is at specific times

d) How the object's velocity is changing


Which information about a moving object can we NOT extract from a motion diagram?

a) What the object was doing before the first dot of the motion diagram

b) Where the object is at specific times

c) What the object's velocity is at specific times

d) How the object's velocity is changing


Which of the following statements is true?

a) Displacement and distance are always the same.

b) Path length and distance are always the same.

c) Position is always the same as distance.

d) Distance is always the length of the displacement.


Which of the following statements is true?

a) Displacement and distance are always the same.

b) Path length and distance are always the same.

c) Position is always the same as distance.

d) Distance is always the length of the displacement.


A person starts at xi = –2.0 m and endsat xf = 3.0 m.

Given the ground as a reference frame and a coordinate axis pointing to the right, which of the following is NOT FALSE ?

a) The displacement vector points to the left.

b) The value of the displacement dx is –5.0 m.

c) The value of the displacement dx is +5.0 m.

d) The distance traveled is –5.0 m.


A person starts at xi = –2.0 m and endsat xf = 3.0 m.

Given the ground as a reference frame and a coordinate axis pointing to the right, which of the following is NOT FALSE ?

a) The displacement vector points to the left.

b) The value of the displacement dx is –5.0 m.

c) The value of the displacement dx is +5.0 m.

d) The distance traveled is –5.0 m.


Sammy went hiking between two camps that were separated by about 10 kilometers (km). He hiked approximately 16 km to get from one camp to the

other. Which of the following is the CORRECT translation of 10 km and 16 km into the language of

physical quantities?

a) 10 km is the displacement; 16 km is the distance.

b) 10 km is the initial position xi; 16 km is the final position xf.

c) 16 km is the displacement; 10 km is the distance.

d) 16 km is the path length; 10 km is the distance.


Sammy went hiking between two camps that were separated by about 10 kilometers (km). He hiked approximately 16 km to get from one camp to the

other. Which of the following is the CORRECT translation of 10 km and 16 km into the language of

physical quantities?

a) 10 km is the displacement; 16 km is the distance.

b) 10 km is the initial position xi; 16 km is the final position xf.

c) 16 km is the displacement; 10 km is the distance.

d) 16 km is the path length; 10 km is the distance.


By drawing the graph from the motion diagram,what are we NOT able to do?

a) Infer the position of theobject for times betweenthe ones wheremeasurements were taken

b) Infer the position of theobject before the initial pointin the motion diagram

c) Infer a trend in the observedmotion data


By drawing the graph from the motion diagram,what are we NOT able to do?

a) Infer the position of theobject for times betweenthe ones wheremeasurements were taken

b) Infer the position of theobject before the initialpoint in the motion diagram

c) Infer a trend in the observedmotion data


What can we infer from the following graph?

a) The object's motion endswhen it reaches 10 mfrom the origin.

b) The object gets fartherfrom the origin with time.

c) The object started to theleft of the origin.

d) The object's final positionis above its initial position.


What can we infer from the following graph?

a) The object's motion endswhen it reaches 10 mfrom the origin.

b) The object gets fartherfrom the origin with time.

c) The object started to theleft of the origin.

d) The object's final positionis above its initial position.


Which of the following statements is always true about the description of motion of an object

by two observers? (Be prepared to give a counter-example for each

situation you think is incorrect.)a) Two observers using the same reference frame will

always have the same description of motion.

b) Two observers using the same coordinate axis (including the origin) will always have the same description of motion.

c) Two observers using the same coordinate axis (including the origin) and reference frame will always have the same description of motion.


Which of the following statements is always true about the description of motion of an object

by two observers? (Be prepared to give a counter-example for each

situation you think is incorrect.)a) Two observers using the same reference frame will

always have the same description of motion.

b) Two observers using the same coordinate axis (including the origin) will always have the same description of motion.

c) Two observers using the same coordinate axis (including the origin) and reference frame will always have the same description of motion.


Which of the following statements is consistent with what the variables indicate for the general linear

function y(x) = kx + b?

a) The variable x depends on y.

b) b is the slope of the line.

c) y is the slope of the line.

d) b is the y-intercept.

e) k is the y-intercept.


Which of the following statements is consistent with what the variables indicate for the general linear

function y(x) = kx + b?

a) The variable x depends on y.

b) b is the slope of the line.

c) y is the slope of the line.

d) b is the y-intercept.

e) k is the y-intercept.


Which parameter can we NOT determine fromthe following graph?

a) Initial position x0

b) Speed of the object

c) Velocity of the object

d) Position of the objectat time t = 3 s

e) Position of the object at t = 8 s


Which parameter can we NOT determine fromthe following graph?

a) Initial position x0

b) Speed of the object

c) Velocity of the object

d) Position of the objectat time t = 3 s

e) Position of the object at t = 8 s


What can we conclude about the motion of car A compared to car B?

a) Car A and car B are not atthe same location at t = 0.

b) Car B is 1 m ahead of car Aat t = 4 s.

c) Car B is moving faster thancar A.

d) Both cars are moving inthe –x direction.

e) Car A is moving faster than car B.


What can we conclude about the motion of car A compared to car B?

a) Car A and car B are not atthe same location at t = 0.

b) Car B is 1 m ahead of car Aat t = 4 s.

c) Car B is moving faster thancar A.

d) Both cars are moving inthe –x direction.

e) Car A is moving faster than car B.


A cyclist moves at a constant velocity of –8 m/s and starts at x0 = 0 m. Which of the following

statements is incorrect?

a) The cyclist has a speed of 8 m/s.

b) The cyclist has moved 8 meters after 1 second has passed.

c) The cyclist is at x = +8 m at t = 1 s.

d) The cyclist is at x = –8 m at t = 1 s.


A cyclist moves at a constant velocity of –8 m/s and starts at x0 = 0 m. Which of the following

statements is incorrect?

a) The cyclist has a speed of 8 m/s.

b) The cyclist has moved 8 meters after 1 second has passed.

c) The cyclist is at x = +8 m at t = 1 s.

d) The cyclist is at x = –8 m at t = 1 s.


Compare two objects (positions are in meters,time is in seconds):

x1 = 5t + 3x2 = –4t + 0

Which of the following is incorrect?a) Object 2 starts at the origin.

b) Object 1 and object 2 are moving in opposite directions.

c) Object 1 has a speed of 5 m/s.

d) Object 2 has a velocity of 4 m/s.


Compare two objects (positions are in meters,time is in seconds):

x1 = 5t + 3x2 = –4t + 0

Which of the following is incorrect?a) Object 2 starts at the origin.

b) Object 1 and object 2 are moving in opposite directions.

c) Object 1 has a speed of 5 m/s.

d) Object 2 has a velocity of 4 m/s.


What is the displacement of "you" betweent = 0 and t = 2 s?

a) 0 m

b) +3 m

c) +6 m

d) +9 m


What is the displacement of "you" betweent = 0 and t = 2 s?

a) 0 m

b) +3 m

c) +6 m

d) +9 m


What is the displacement (x – x0) between t = 0 s and t = 2 s given that the equation for position

as a function of time is x = 3t + 0(x in meters, t in seconds)?

a) 0 m

b) +3 m

c) +6 m

d) +9 m


What is the displacement (x – x0) between t = 0 s and t = 2 s given that the equation for position

as a function of time is x = 3t + 0(x in meters, t in seconds)?

a) 0 m

b) +3 m

c) +6 m

d) +9 m


The equation for your position as a function oftime is x = 3t + 0 (x in meters, t in seconds).Compare that to the graph of your velocity.

Which statement is incorrect?

a) We can find the displacementbetween t = 0 and t = 2 sfrom the equation or the graph.

b) We can find your velocity fromeither the equation or the graph.

c) We can find your initial positionfrom either the equation or the graph.

d) We can find your accelerationfrom either the equationor the graph.


The equation for your position as a function oftime is x = 3t + 0 (x in meters, t in seconds).Compare that to the graph of your velocity.

Which statement is incorrect?

a) We can find the displacementbetween t = 0 and t = 2 sfrom the equation or the graph.

b) We can find your velocity fromeither the equation or the graph.

c) We can find your initial positionfrom either the equation or the graph.

d) We can find your accelerationfrom either the equationor the graph.


Why is the following statement true? "Displacement is equal to the area between a velocity-versus-time

graph line and the time axis with a positive or negative sign."

a) This is consistent with the definition of the slope of the position versus time graph.

b) This is consistent with finding the height times the width of the velocity graph.

c) This yields a result consistent with applying the equation for linear motion.

d) All of the above are true.


Why is the following statement true? "Displacement is equal to the area between a velocity-versus-time

graph line and the time axis with a positive or negative sign."

a) This is consistent with the definition of the slope of the position versus time graph.

b) This is consistent with finding the height times the width of the velocity graph.

c) This yields a result consistent with applying the equation for linear motion.

d) All of the above are true.


Which of the following situations corresponds to a positive acceleration?

a) An object moving in the –x direction and slowing down

b) An object moving in the –x direction and speeding up

c) An object moving in the +x direction and slowing down

d) None of the above


Which of the following situations corresponds to a positive acceleration?

a) An object moving in the –x direction and slowing down

b) An object moving in the –x direction and speeding up

c) An object moving in the +x direction and slowing down

d) None of the above


An object has an initial velocity of –4 m/sand a constant acceleration of 3 m/s2.

What is its velocity at t = 2 s?

a) –10 m/s

b) –2 m/s

c) +2 m/s

d) +10 m/s


An object has an initial velocity of –4 m/sand a constant acceleration of 3 m/s2.

What is its velocity at t = 2 s?

a) –10 m/s

b) –2 m/s

c) +2 m/s

d) +10 m/s


What are the SI units of (1/2)axt2?

a) s

b) s2

c) m

d) m/s

e) m/s2


What are the SI units of (1/2)axt2?

a) s

b) s2

c) m

d) m/s

e) m/s2


An object starts at rest 3 m from the origin and has an acceleration of –1 m/s2. What is its

position at t = 2 s?

a) –5 m

b) –2 m

c) 1 m

d) 3 m


An object starts at rest 3 m from the origin and has an acceleration of –1 m/s2. What is its

position at t = 2 s?

a) –5 m

b) –2 m

c) 1 m

d) 3 m


The following equation describes an object's motion:x = (2 m) + (0)t + (1/2)(–1 m/s2)t2

Which of the following statements is correct?

a) The object starts to the left of the origin.

b) The object starts with an initial velocity.

c) The object has constant velocity.

d) The object is speeding up.


The following equation describes an object's motion:x = (2 m) + (0)t + (1/2)(–1 m/s2)t2

Which of the following statements is correct?

a) The object starts to the left of the origin.

b) The object starts with an initial velocity.

c) The object has constant velocity.

d) The object is speeding up.


A car's motion with respect to the ground is described by the following function: x = (–48 m) + (+12 m/s)t + (–0.5 m/s2)t2

Which statement is INCORRECT?

a) The position of the car at t = 0 is –48 m.

b) The initial velocity of the car is +12 m/s.

c) The acceleration of the car is –0.5 m/s2.

d) The acceleration of the car is –1.0 m/s2.


A car's motion with respect to the ground is described by the following function: x = (–48 m) + (+12 m/s)t + (–0.5 m/s2)t2

Which statement is INCORRECT?

a) The position of the car at t = 0 is –48 m.

b) The initial velocity of the car is +12 m/s.

c) The acceleration of the car is –0.5 m/s2.

d) The acceleration of the car is –1.0 m/s2.


When an object is thrown upward, what is its acceleration (given a coordinate axis choice

where +y is downward)?

a) –9.8 m/s2

b) 0 m/22

c) 9.8 m/s2


When an object is thrown upward, what is its acceleration (given a coordinate axis choice

where +y is downward)?

a) –9.8 m/s2

b) 0 m/22

c) 9.8 m/s2


At t = 0, an object is 10 m above the ground, moving upward with a velocity of 1 m/s. Which of the

following equations correctly describes the object's position as a function of time given a coordinate axis

where y = 0 at the ground and +y is downward?

a) y = (–10 m) + (–1 m/s)t + (1/2)(9.8 m/s2)t2

b) y = (10 m) + (–1 m/s)t + (1/2)(–9.8 m/s2)t2

c) y = (10 m) + (1 m/s)t + (1/2)(–9.8 m/s2)t2

d) y = (–10 m) + (1 m/s)t + (1/2)(9.8 m/s2)t2


At t = 0, an object is 10 m above the ground, moving upward with a velocity of 1 m/s. Which of the

following equations correctly describes the object's position as a function of time given a coordinate axis

where y = 0 at the ground and +y is downward?

a) y = (–10 m) + (–1 m/s)t + (1/2)(9.8 m/s2)t2

b) y = (10 m) + (–1 m/s)t + (1/2)(–9.8 m/s2)t2

c) y = (10 m) + (1 m/s)t + (1/2)(–9.8 m/s2)t2

d) y = (–10 m) + (1 m/s)t + (1/2)(9.8 m/s2)t2


At t = 0, an object is 30 m above the ground,moving upward with a velocity of 1 m/s.

Where is the object at t = 2 s(approximate g of 10 m/s2)?

a) 10 m

b) 12 m

c) 48 m

d) 50 m


At t = 0, an object is 30 m above the ground,moving upward with a velocity of 1 m/s.

Where is the object at t = 2 s(approximate g of 10 m/s2)?

a) 10 m

b) 12 m

c) 48 m

d) 50 m

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Chapter 1 Clickers © 2014 Pearson Education, Inc. Kinematics: Motion in One Dimension Prepared by Dedra Demaree, Georgetown University