Question 1

Which of the following is not a vector quantity?

Accepted Answer

A)   temperature
B)   velocity
C)   acceleration
D)   displacement A

Question 2

An astronaut applies a force of 500 N to an asteroid,and it accelerates at 3.00 m/s2.What is the asteroid's mass?

Accepted Answer

A)   1500 kg
B)   135 kg
C)   600 kg
D)   167 kg D

Question 3

A car is initially moving at 30 m/s east and a little while later it is moving at 10 m/s north.Which of the following best describes the orientation of the average acceleration during this time interval?

Accepted Answer

A)   north of west
B)   northwest
C)   west
D)   north of east A

Question 4

A physics student is riding on a train traveling north.Having read about inertia,the student performs an experiment with a golf ball.He reaches over the aisle and drops the ball from rest.Instead of hitting the floor directly below the student's hand,it hits to the north,i.e. ,forward of that position.Which of the following might be the cause for this to happen?

Accepted Answer

A)   The train is moving at constant velocity.
B)   The train is speeding up.
C)   The train is slowing down.
D)   Whatever the cause,it cannot be any of the answers given.

Question 5

An object is dropped from a height.Once it is moving,which of the following statements is true,at least at one point?

Accepted Answer

A)   Its velocity is more than its acceleration.
B)   Its velocity is less than its acceleration.
C)   Its velocity is the same as its acceleration.
D)   Its velocity is never equal to its acceleration.

Question 6

​Suppose a particle is moving along a straight line with a speed v for a time t,then stops for a time t,and then resumes moving along the original direction with speed v for time t.What has been the average speed of the particle for the total time period 3t?

Accepted Answer

A)   v
B)  2 v / 3
C)   1.5v
D)

Question 7

A railroad train travels forward along a straight track at 80.0 m/s for 1000 m and then travels at 40.0 m/s for the next 1000 m.What is the average velocity?

Accepted Answer

A)   60.0 m/s
B)   37.5 m/s
C)   63.7 m/s
D)   53.3 m/s

Question 8

The net force on an object in the positive x direction.Consider the following statements:
i.The object can be moving in the negative x direction.
ii.The object can be speeding up.
iii.The object can be slowing down.
iv.The object can be moving in the positive y direction.
Which of the statements are true?

Accepted Answer

A)   (i) and (ii) 
B)   (ii) and (iii) 
C)   (iii) and (iv) 
D)   Choose this answer if all the statements are true.

Question 9

A strobe photograph of a car moving along a straight road shows the interval between each successive image to be diminishing.If the direction of motion of the car is taken as positive,which of the following are negative?

Accepted Answer

A)   the speed of the car
B)   the average velocity of the car
C)   the average acceleration of the car
D)   all of the above

Question 10

A bird,accelerating from rest at a constant rate,experiences a displacement of 37 m in 11 s.What is its acceleration?

Accepted Answer

A)   0.20 m/s2
B)   0.31 m/s2
C)   0.51 m/s2
D)   0.61 m/s2

Question 11

A change in a physical quantity w having initial value wi and final value wf is given by which of the following?

Accepted Answer

A)   wi − wf
B)   wf − wi
C)   (wf + wi) /2
D)   none of the above

Question 12

In which of the following cases is the displacement's magnitude half the distance traveled?

Accepted Answer

A)   10 steps east followed by 3 steps west
B)   22 steps east followed by 11 steps west
C)   5 steps east followed by 10 steps west
D)   15 steps east followed by 5 steps west

Question 13

The first displacement is 7 m and the second displacement is 3 m.They cannot add together to give a total displacement of:

Accepted Answer

A)   10 m.
B)   7 m.
C)   4 m.
D)   3 m.

Question 14

When NASA was communicating with astronauts on the Moon,the time from sending on the Earth to receiving on the Moon was 1.33 s.Find the distance from Earth to the Moon.(The speed of radio waves is 3.00 × 108 m/s. )

Accepted Answer

A)   240,000 km
B)   384,000 km
C)   399,000 km
D)   768,000 km

Question 15

A v-t graph is drawn for a ball moving in one direction.The graph starts at the origin and at t = 6 s the acceleration of the ball is zero.We know that at t = 6 s,

Accepted Answer

A)   the slope of the curve is non-zero.
B)   the curve is not crossing the time axis.
C)   the velocity of the ball is not changing.
D)   the curve is at v = 0,t = 0.

Question 16

In one-dimensional motion where the direction is indicated by a plus or minus sign,the average velocity of an object has which of the following properties?

Accepted Answer

A)   It is positive.
B)   It is negative.
C)   It is zero.
D)   It can be positive,negative,or zero.

Question 17

An object moves 10 m east in 30 s and then returns to its starting point taking an additional 70 s.If west is chosen as the positive direction,what is the average speed of the object?

Accepted Answer

A)   0.20 m/s
B)   -0.20 m/s
C)   0.50 m/s
D)   0 m/s

Question 18

On a position-time graph for a particle,suppose the plot starts at some positive position and as the time goes on the curve gets steeper and steeper while curving upwards.Which of the following must be true?

Accepted Answer

A)   The speed of the particle is constant.
B)   The acceleration of the particle is constant.
C)   The speed of the particle is decreasing.
D)   The acceleration of the particle is positive.

Question 19

A car is moving along a straight highway and accelerates at a constant rate while going from point A to point B.If the acceleration is positive,increasing the speed of the car,where does the position where the instantaneous speed equals the average speed occur for the interval from A to B?

Accepted Answer

A)   midway between A and B
B)   closer to A than to B
C)   closer to B than to A
D)   Any of the answers could be correct depending on the original speed.

Question 20

The slope of the acceleration-time curve represents:

Accepted Answer

A)   the velocity.
B)   the rate of change of acceleration.
C)   the rate of change of displacement.
D)   the area under the position vs.time curve.

Exam 2: Motion in One Dimension: Part A

Which of the following is not a vector quantity?

An astronaut applies a force of 500 N to an asteroid,and it accelerates at 3.00 m/s².What is the asteroid's mass?

A car is initially moving at 30 m/s east and a little while later it is moving at 10 m/s north.Which of the following best describes the orientation of the average acceleration during this time interval?

An object is dropped from a height.Once it is moving,which of the following statements is true,at least at one point?

Suppose a particle is moving along a straight line with a speed v for a time t,then stops for a time t,and then resumes moving along the original direction with speed v for time t.What has been the average speed of the particle for the total time period 3t?

A railroad train travels forward along a straight track at 80.0 m/s for 1000 m and then travels at 40.0 m/s for the next 1000 m.What is the average velocity?

A strobe photograph of a car moving along a straight road shows the interval between each successive image to be diminishing.If the direction of motion of the car is taken as positive,which of the following are negative?

A bird,accelerating from rest at a constant rate,experiences a displacement of 37 m in 11 s.What is its acceleration?

A change in a physical quantity w having initial value w_i and final value w_f is given by which of the following?

In which of the following cases is the displacement's magnitude half the distance traveled?

The first displacement is 7 m and the second displacement is 3 m.They cannot add together to give a total displacement of:

When NASA was communicating with astronauts on the Moon,the time from sending on the Earth to receiving on the Moon was 1.33 s.Find the distance from Earth to the Moon.(The speed of radio waves is 3.00 × 10⁸ m/s. )

A v-t graph is drawn for a ball moving in one direction.The graph starts at the origin and at t = 6 s the acceleration of the ball is zero.We know that at t = 6 s,

In one-dimensional motion where the direction is indicated by a plus or minus sign,the average velocity of an object has which of the following properties?

An object moves 10 m east in 30 s and then returns to its starting point taking an additional 70 s.If west is chosen as the positive direction,what is the average speed of the object?

On a position-time graph for a particle,suppose the plot starts at some positive position and as the time goes on the curve gets steeper and steeper while curving upwards.Which of the following must be true?

A car is moving along a straight highway and accelerates at a constant rate while going from point A to point B.If the acceleration is positive,increasing the speed of the car,where does the position where the instantaneous speed equals the average speed occur for the interval from A to B?

The slope of the acceleration-time curve represents:

Exam 2: Motion in One Dimension: Part A

Which of the following is not a vector quantity?

An astronaut applies a force of 500 N to an asteroid,and it accelerates at 3.00 m/s2.What is the asteroid's mass?

A car is initially moving at 30 m/s east and a little while later it is moving at 10 m/s north.Which of the following best describes the orientation of the average acceleration during this time interval?

An object is dropped from a height.Once it is moving,which of the following statements is true,at least at one point?

​Suppose a particle is moving along a straight line with a speed v for a time t,then stops for a time t,and then resumes moving along the original direction with speed v for time t.What has been the average speed of the particle for the total time period 3t?

A railroad train travels forward along a straight track at 80.0 m/s for 1000 m and then travels at 40.0 m/s for the next 1000 m.What is the average velocity?

A strobe photograph of a car moving along a straight road shows the interval between each successive image to be diminishing.If the direction of motion of the car is taken as positive,which of the following are negative?

A bird,accelerating from rest at a constant rate,experiences a displacement of 37 m in 11 s.What is its acceleration?

A change in a physical quantity w having initial value wi and final value wf is given by which of the following?

In which of the following cases is the displacement's magnitude half the distance traveled?

The first displacement is 7 m and the second displacement is 3 m.They cannot add together to give a total displacement of:

When NASA was communicating with astronauts on the Moon,the time from sending on the Earth to receiving on the Moon was 1.33 s.Find the distance from Earth to the Moon.(The speed of radio waves is 3.00 × 108 m/s. )

A v-t graph is drawn for a ball moving in one direction.The graph starts at the origin and at t = 6 s the acceleration of the ball is zero.We know that at t = 6 s,

In one-dimensional motion where the direction is indicated by a plus or minus sign,the average velocity of an object has which of the following properties?

An object moves 10 m east in 30 s and then returns to its starting point taking an additional 70 s.If west is chosen as the positive direction,what is the average speed of the object?

On a position-time graph for a particle,suppose the plot starts at some positive position and as the time goes on the curve gets steeper and steeper while curving upwards.Which of the following must be true?

A car is moving along a straight highway and accelerates at a constant rate while going from point A to point B.If the acceleration is positive,increasing the speed of the car,where does the position where the instantaneous speed equals the average speed occur for the interval from A to B?

The slope of the acceleration-time curve represents:

An astronaut applies a force of 500 N to an asteroid,and it accelerates at 3.00 m/s².What is the asteroid's mass?

Suppose a particle is moving along a straight line with a speed v for a time t,then stops for a time t,and then resumes moving along the original direction with speed v for time t.What has been the average speed of the particle for the total time period 3t?

A change in a physical quantity w having initial value w_i and final value w_f is given by which of the following?

When NASA was communicating with astronauts on the Moon,the time from sending on the Earth to receiving on the Moon was 1.33 s.Find the distance from Earth to the Moon.(The speed of radio waves is 3.00 × 10⁸ m/s. )