Question 1

On a graph that shows velocity on the vertical axis and time on the horizontal axis,zero acceleration is represented by

Accepted Answer

A)  a straight line with a positive slope.
B)  a straight line with a negative slope.
C)  a straight line with zero slope.
D)  either a,b,or c.
E)  None of these is correct. C

Question 2

The distance traveled by a car in the x-direction is shown.When the car changes speed for t = 10 s to 15 s,it does so uniformly.Use the graph below to answer the question. 
-If the position of an object is plotted vertically on a graph and the time is plotted horizontally,the instantaneous velocity at a particular time is

Accepted Answer

A)  the height of the curve at that time.
B)  the total length of the curve.
C)  the slope of the tangent to the curve at that time.
D)  the area under the curve from zero to that time.
E)  impossible to determine from this type of plot. C

Question 3

Two baseballs are thrown vertically up from the ground at the same speed,one on Earth,and one on Mars.The baseball on Earth reaches a maximum height of 25 m.Which ball hits the ground first and by what time difference? (gMars = 0.38 gEarth)

Accepted Answer

A)  Mars by 7.4 s
B)  Earth by 7.4 s
C)  Earth by 3.7 s
D)  Mars by 3.7 s
E)  Earth by 2.7 s B

Question 4

An object falling near the surface of Earth has a constant acceleration of 9.8 m/s2.This means that the

Accepted Answer

A)  object falls 9.8 m during the first second of its motion.
B)  object falls 9.8 m during each second of its motion.
C)  speed of the object increases by 9.8 m/s during each second of its motion.
D)  acceleration of the object increases by 9.8 m/s2 during each second of its motion.
E)  force of gravity on the object must be 9.8 SI units.

Question 5

Use the following to answer the question: 
-In which graph does the particle never have a constant acceleration?

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  5

Question 6

On a graph that shows position on the vertical axis and time on the horizontal axis,the area under the curve represents

Accepted Answer

A)  average acceleration.
B)  average velocity.
C)  displacement.
D)  average speed.
E)  nothing of physical significance.

Question 7

It takes the Mars rover 4.5 minutes to send information via a radio signal traveling at the speed of light back to Mission Control on Earth.How far away is the rover?

Accepted Answer

A)  8.1  ×	imes×  1010 km
B)  1.35  ×	imes×  109 m
C)  8.10  ×	imes×  1010 m
D)  1.35  ×	imes×  109 km
E)  1.62  ×	imes×  1011 m

Question 8

The velocity of a particle is given by v(t)= 3t.The average velocity for the particle between t = 2 and 4 s is

Accepted Answer

A)  4 m/s
B)  6 m/s
C)  9 m/s
D)  12 m/s
E)  18 m/s

Question 9

You drive for 30 min at 100 km/h and then stop for 15 min.You then drive for 45 min at 80 km/h.Your average speed for the entire trip is

Accepted Answer

A)  73 km/h.
B)  83 km/h.
C)  88 km/h.
D)  90 km/h.
E)  97 km/h.

Question 10

The displacement of an object during any time interval is always ________ the distance it travels during that same time interval.

Accepted Answer

A)  greater than or equal to
B)  less than or equal to
C)  equal to
D)  greater than
E)  much greater than

Question 11

The distance traveled by a car in the x-direction is shown.When the car changes speed for t = 10 s to 15 s,it does so uniformly.Use the graph below to answer question. 
-The acceleration of the car at 5 s is ____ acceleration at 20 s.

Accepted Answer

A)  less than the
B)  equal to the
C)  greater than the
D)  unable to tell
E)  depends on what happens when it is accelerating between 10 and 15 s

Question 12

The distance traveled by a car in the x-direction is shown.When the car changes speed for t = 10 s to 15 s,it does so uniformly.Use the graph below to answer the question. 
-The speed of the car at 17.5 s is

Accepted Answer

A)  5 m/s
B)  10 m/s
C)  15 m/s
D)  20 m/s
E)  25 m/s

Question 13

A vehicle is traveling in the +x direction to x = 100 m.It then reverses direction.At the instant when it changes direction,the acceleration of the vehicle is

Accepted Answer

A)  positive.
B)  negative.
C)  zero.
D)  positive then negative.
E)  negative then positive.

Question 14

On a graph that shows position on the vertical axis and time on the horizontal axis,a parabolic curve that opens downward represents

Accepted Answer

A)  a constant positive acceleration.
B)  a constant negative acceleration.
C)  no acceleration.
D)  a positive followed by a negative acceleration.
E)  a negative followed by a positive acceleration.

Question 15

Use the following to answer the question: 
-In which graph does the particle have no acceleration at t = 5 s?

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  5

Question 16

An object is dropped from rest near the surface of Earth.If the time interval during which it falls is doubled,the distance it falls will

Accepted Answer

A)  double.
B)  decrease by one-half.
C)  increase by a factor of four.
D)  decrease by a factor of four.
E)  not change.

Question 17

The acceleration of a vehicle is given by a(t)= At where A is a constant.Its velocity as a function of time is (vo is a constant)

Accepted Answer

A)    o is a constant)  
A)        
B)  v(t) = At2 + vo 
C)  v(t) = At + vo 
D)        
E)  None of these is correct." class="answers-bank-image d-inline" rel="preload" >  
B)  v(t) = At2 + vo
C)  v(t) = At + vo
D)    o is a constant)  
A)        
B)  v(t) = At2 + vo 
C)  v(t) = At + vo 
D)        
E)  None of these is correct." class="answers-bank-image d-inline" rel="preload" >  
E)  None of these is correct.

Question 18

Assume that the Deschutes River has straight and parallel banks and that the current is 0.75 m/s.Drifting down the river,you fall out of your boat and immediately grab a piling of the Warm Springs Bridge.You hold on for 40 s and then swim after the boat with a speed relative to the water of 0.95 m/s.The distance of the boat downstream from the bridge when you catch it is

Accepted Answer

A)  67 m.
B)  90 m.
C)  78 m.
D)  54 m.
E)  120 m.

Question 19

A racecar starts from rest and accelerates at a constant rate and reaches a speed of 160 km/h (100 mph)in 6.0 seconds.It continues at this speed for another 5 seconds.What is the car's average speed during the first 11 seconds?

Accepted Answer

A)  34.3 m/s
B)  29.3 m/s
C)  22.2 m/s
D)  32.3 m/s
E)  44.4 m/s

Question 20

A ball is dropped from the top of a building.In the absence of air resistance,the ball will hit the ground with a speed of 49 m/s.The height of the building is

Accepted Answer

A)  25 m
B)  5 m
C)  240 m
D)  120 m
E)  10 m

Exam 2: Motion in One Dimension

On a graph that shows velocity on the vertical axis and time on the horizontal axis,zero acceleration is represented by

Two baseballs are thrown vertically up from the ground at the same speed,one on Earth,and one on Mars.The baseball on Earth reaches a maximum height of 25 m.Which ball hits the ground first and by what time difference? (g_Mars = 0.38 g_Earth)

An object falling near the surface of Earth has a constant acceleration of 9.8 m/s².This means that the

Use the following to answer the question: -In which graph does the particle never have a constant acceleration?

On a graph that shows position on the vertical axis and time on the horizontal axis,the area under the curve represents

It takes the Mars rover 4.5 minutes to send information via a radio signal traveling at the speed of light back to Mission Control on Earth.How far away is the rover?

The velocity of a particle is given by v(t) = 3t.The average velocity for the particle between t = 2 and 4 s is

You drive for 30 min at 100 km/h and then stop for 15 min.You then drive for 45 min at 80 km/h.Your average speed for the entire trip is

The displacement of an object during any time interval is always ________ the distance it travels during that same time interval.

The distance traveled by a car in the x-direction is shown.When the car changes speed for t = 10 s to 15 s,it does so uniformly.Use the graph below to answer question. -The acceleration of the car at 5 s is ____ acceleration at 20 s.

The distance traveled by a car in the x-direction is shown.When the car changes speed for t = 10 s to 15 s,it does so uniformly.Use the graph below to answer the question. -The speed of the car at 17.5 s is

A vehicle is traveling in the +x direction to x = 100 m.It then reverses direction.At the instant when it changes direction,the acceleration of the vehicle is

On a graph that shows position on the vertical axis and time on the horizontal axis,a parabolic curve that opens downward represents

Use the following to answer the question: -In which graph does the particle have no acceleration at t = 5 s?

An object is dropped from rest near the surface of Earth.If the time interval during which it falls is doubled,the distance it falls will

The acceleration of a vehicle is given by a(t) = At where A is a constant.Its velocity as a function of time is (v_o is a constant)

A racecar starts from rest and accelerates at a constant rate and reaches a speed of 160 km/h (100 mph) in 6.0 seconds.It continues at this speed for another 5 seconds.What is the car's average speed during the first 11 seconds?

A ball is dropped from the top of a building.In the absence of air resistance,the ball will hit the ground with a speed of 49 m/s.The height of the building is

Exam 2: Motion in One Dimension

On a graph that shows velocity on the vertical axis and time on the horizontal axis,zero acceleration is represented by

Two baseballs are thrown vertically up from the ground at the same speed,one on Earth,and one on Mars.The baseball on Earth reaches a maximum height of 25 m.Which ball hits the ground first and by what time difference? (gMars = 0.38 gEarth)

An object falling near the surface of Earth has a constant acceleration of 9.8 m/s2.This means that the

Use the following to answer the question: -In which graph does the particle never have a constant acceleration?

On a graph that shows position on the vertical axis and time on the horizontal axis,the area under the curve represents

It takes the Mars rover 4.5 minutes to send information via a radio signal traveling at the speed of light back to Mission Control on Earth.How far away is the rover?

The velocity of a particle is given by v(t) = 3t.The average velocity for the particle between t = 2 and 4 s is

You drive for 30 min at 100 km/h and then stop for 15 min.You then drive for 45 min at 80 km/h.Your average speed for the entire trip is

The displacement of an object during any time interval is always ________ the distance it travels during that same time interval.

The distance traveled by a car in the x-direction is shown.When the car changes speed for t = 10 s to 15 s,it does so uniformly.Use the graph below to answer question. -The acceleration of the car at 5 s is ____ acceleration at 20 s.

The distance traveled by a car in the x-direction is shown.When the car changes speed for t = 10 s to 15 s,it does so uniformly.Use the graph below to answer the question. -The speed of the car at 17.5 s is

A vehicle is traveling in the +x direction to x = 100 m.It then reverses direction.At the instant when it changes direction,the acceleration of the vehicle is

On a graph that shows position on the vertical axis and time on the horizontal axis,a parabolic curve that opens downward represents

Use the following to answer the question: -In which graph does the particle have no acceleration at t = 5 s?

An object is dropped from rest near the surface of Earth.If the time interval during which it falls is doubled,the distance it falls will

The acceleration of a vehicle is given by a(t) = At where A is a constant.Its velocity as a function of time is (vo is a constant)

A racecar starts from rest and accelerates at a constant rate and reaches a speed of 160 km/h (100 mph) in 6.0 seconds.It continues at this speed for another 5 seconds.What is the car's average speed during the first 11 seconds?

A ball is dropped from the top of a building.In the absence of air resistance,the ball will hit the ground with a speed of 49 m/s.The height of the building is

Two baseballs are thrown vertically up from the ground at the same speed,one on Earth,and one on Mars.The baseball on Earth reaches a maximum height of 25 m.Which ball hits the ground first and by what time difference? (g_Mars = 0.38 g_Earth)

An object falling near the surface of Earth has a constant acceleration of 9.8 m/s².This means that the

The acceleration of a vehicle is given by a(t) = At where A is a constant.Its velocity as a function of time is (v_o is a constant)