Question 1

A test rocket at ground level is fired straight up from rest with a net upward acceleration of 20 m/s2. After 4.0 s, the motor turns off but the rocket continues to coast upward with insignificant air resistance. What maximum elevation does the rocket reach?

Accepted Answer

A)   160 m
B)   330 m
C)   320 m
D)   410 m
E)   490 mF) None of the above
G) A) and B)

Question 2

If you are driving 72 km/h along a straight road and you look to the side for 4.0 s, how far do you travel during this inattentive period?

Accepted Answer

A)   18 m
B)   20 m
C)   40 m
D)   80 mE) None of the above
F) A) and B)

Question 3

A car that is initially moving at 7.50 m/s begins to accelerate forward uniformly at 0.550 m/s2.
(a) How long after beginning to accelerate does it take the car to move 3.50 km?
(b) How fast is the car moving just as it has traveled 3.50 km?

Accepted Answer

(a) 1.00 ×...

Question 4

What must be your average speed in order to travel 350 km in 5.15 h?

Accepted Answer

A)   66.0 km/h
B)   67.0 km/h
C)   68.0 km/h
D)   69.0 km/hE) A) and B)
F) A) and C)

Question 5

The figure shows a graph of the velocity of an object as a function of time. What is the displacement of the object from 0 s to 6.0 s?

Accepted Answer

A)   20 m
B)   40 m
C)   60 m
D)   80 m
E)   100 mF) A) and E)
G) A) and D)

Question 6

The slope of a velocity versus time graph gives

Accepted Answer

A)   the distance traveled.
B)   velocity.
C)   acceleration.
D)   displacement.E) B) and D)
F) A) and D)

Question 7

A car moving initially with speed v0 slows down with an acceleration of magnitude a and comes to a full stop after traveling a distance d. What was the speed of the car when it had traveled half that distance, d/2?

Accepted Answer

A)   v0/2
B)   v0/4
C)   v0/  2\sqrt { 2 }2c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5,-10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8,-50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0,35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5,-221l0 -0c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422s-65,47,-65,47zM834 80h400000v40h-400000z'/>​ 
D)   v0/8 E) B) and C)
F) B) and D)

Question 8

A ball is thrown straight up with a speed of 36 m/s. How long does it take to return to its starting point, assuming negligible air resistance?

Accepted Answer

A)   3.7 s
B)   7.3 s
C)   11 s
D)   15 sE) C) and D)
F) None of the above

Question 9

A certain test car can go from rest to 32.0 m/s in 3.88 s. The same car can come to a full stop from that speed in 4.14 s. What is the ratio of the magnitude of the starting acceleration to the stopping acceleration?

Accepted Answer

A)   0.937
B)   1.07
C)   0.878
D)   1.14E) B) and D)
F) None of the above

Question 10

Which of the following quantities has units of a displacement? (There could be more than one correct choice.)

Accepted Answer

A)   32 ft/s2 vertically downward
B)   40 km southwest
C)   9.8 m/s2
D)   -120 m/s
E)   186,000 miF) B) and E)
G) B) and D)

Question 11

An object starts from rest and undergoes uniform acceleration. During the first second it travels 5.0 m. How far will it travel during the third second?

Accepted Answer

A)   5.0 m
B)   15 m
C)   25 m
D)   45 mE) B) and C)
F) None of the above

Question 12

The figure shows a graph of the velocity of an object as a function of time. What is the acceleration of the object at the following times?
(a) At 1.0 s
(b) At 3.0 s

Accepted Answer

(a) 10 m/s...

Question 13

A laser is thrown upward with a speed of 12 m/s on the surface of planet X where the acceleration due to gravity is 1.5 m/s2 and there is no atmosphere. How long does it take for the laser to reach the maximum height?

Accepted Answer

A)   8.0 s
B)   11 s
C)   14 s
D)   16 sE) All of the above
F) B) and C)

Question 14

A car accelerates from  5.0 m/s5.0 \mathrm {~m} / \mathrm { s }5.0 m/s  to  21 m/s21 \mathrm {~m} / \mathrm { s }21 m/s  at a constant rate of  3.0 m/s23.0 \mathrm {~m} / \mathrm { s } ^ { 2 }3.0 m/s2  How far does it travel while accelerating?

Accepted Answer

A)   69 m
B)   207 m
C)   41 m
D)   117 m E) B) and C)
F) A) and B)

Question 15

A light-year is the distance that light travels in one year. The speed of light is 3.00 × 108 m/s. How many miles are there in one light-year? (1 mi = 1609 m, 1 y = 365 d)

Accepted Answer

A)   9.46 × 1012 mi
B)   9.46 × 1015 mi
C)   5.88 × 1012 mi
D)   5.88 × 1015 miE) A) and B)
F) All of the above

Question 16

A car is moving with a constant acceleration. At time t = 5.0 s its velocity is 8.0 m/s in the forward direction, and at time t = 8.0 s its velocity is 12.0 m/s forward. What is the distance traveled in that interval of time?

Accepted Answer

A)   10 m
B)   20 m
C)   30 m
D)   40 m
E)   50 mF) D) and E)
G) All of the above

Question 17

A water rocket can reach a speed of 75 m/s in 0.050 seconds from launch. What is its average acceleration?

Accepted Answer

The answer of A water rocket can reach a speed...

Question 18

The graph in the figure shows the position of a particle as it travels along the x-axis. What is the magnitude of the average speed of the particle between t = 1.0 s and t = 4.0 s?

Accepted Answer

A)   1.0 m/s
B)   1.3 m/s
C)   0.67 m/s
D)   0.50 m/s
E)   0.25 m/sF) D) and E)
G) A) and C)

Question 19

A ball is thrown straight upward from ground level with a speed of  18 m/s18 \mathrm {~m} / \mathrm { s }18 m/s  How much time passes before the ball strikes the ground if we disregard air resistance?

Accepted Answer

A)   3.7 s
B)   1.8 s
C)   1.1 s
D)   0.6 s E) A) and C)
F) All of the above

Question 20

An object moving in the +x direction experiences an acceleration of +2.0 m/s2. This means the object

Accepted Answer

A)   travels 2.0 m in every second.
B)   is traveling at 2.0 m/s.
C)   is decreasing its velocity by 2.0 m/s every second.
D)   is increasing its velocity by 2.0 m/s every second.E) All of the above
F) A) and D)

Exam 2: Motion in One Dimension

An object starts from rest and undergoes uniform acceleration. During the first second it travels 5.0 m. How far will it travel during the third second?

Correct AnswerverifiedShow Answer

A ball is thrown straight upward from ground level with a speed of 18 m/s18 \mathrm {~m} / \mathrm { s }18 m/s How much time passes before the ball strikes the ground if we disregard air resistance?

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A light-year is the distance that light travels in one year. The speed of light is 3.00 × 108 m/s. How many miles are there in one light-year? (1 mi = 1609 m, 1 y = 365 d)

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What must be your average speed in order to travel 350 km in 5.15 h?

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A car is moving with a constant acceleration. At time t = 5.0 s its velocity is 8.0 m/s in the forward direction, and at time t = 8.0 s its velocity is 12.0 m/s forward. What is the distance traveled in that interval of time?

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A car that is initially moving at 7.50 m/s begins to accelerate forward uniformly at 0.550 m/s2. (a) How long after beginning to accelerate does it take the car to move 3.50 km? (b) How fast is the car moving just as it has traveled 3.50 km?

Correct Answerverified(a) 1.00 ×...View AnswerShow Answer

A laser is thrown upward with a speed of 12 m/s on the surface of planet X where the acceleration due to gravity is 1.5 m/s2 and there is no atmosphere. How long does it take for the laser to reach the maximum height?

Correct AnswerverifiedShow Answer

A water rocket can reach a speed of 75 m/s in 0.050 seconds from launch. What is its average acceleration?

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If you are driving 72 km/h along a straight road and you look to the side for 4.0 s, how far do you travel during this inattentive period?

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An object moving in the +x direction experiences an acceleration of +2.0 m/s2. This means the object

Correct AnswerverifiedShow Answer

The slope of a velocity versus time graph gives

Correct AnswerverifiedShow Answer

A ball is thrown straight up with a speed of 36 m/s. How long does it take to return to its starting point, assuming negligible air resistance?

Correct AnswerverifiedShow Answer

A car moving initially with speed v0 slows down with an acceleration of magnitude a and comes to a full stop after traveling a distance d. What was the speed of the car when it had traveled half that distance, d/2?

Correct AnswerverifiedShow Answer

The figure shows a graph of the velocity of an object as a function of time. What is the displacement of the object from 0 s to 6.0 s?

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Which of the following quantities has units of a displacement? (There could be more than one correct choice.)

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A car accelerates from 5.0 m/s5.0 \mathrm {~m} / \mathrm { s }5.0 m/s to 21 m/s21 \mathrm {~m} / \mathrm { s }21 m/s at a constant rate of 3.0 m/s23.0 \mathrm {~m} / \mathrm { s } ^ { 2 }3.0 m/s2 How far does it travel while accelerating?

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The graph in the figure shows the position of a particle as it travels along the x-axis. What is the magnitude of the average speed of the particle between t = 1.0 s and t = 4.0 s?

Correct AnswerverifiedShow Answer

A test rocket at ground level is fired straight up from rest with a net upward acceleration of 20 m/s2. After 4.0 s, the motor turns off but the rocket continues to coast upward with insignificant air resistance. What maximum elevation does the rocket reach?

Correct AnswerverifiedShow Answer

The figure shows a graph of the velocity of an object as a function of time. What is the acceleration of the object at the following times? (a) At 1.0 s (b) At 3.0 s

Correct Answerverified(a) 10 m/s...View AnswerShow Answer

A certain test car can go from rest to 32.0 m/s in 3.88 s. The same car can come to a full stop from that speed in 4.14 s. What is the ratio of the magnitude of the starting acceleration to the stopping acceleration?

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A ball is thrown straight upward from ground level with a speed of $18 \mathrm {~m} / \mathrm { s }$ How much time passes before the ball strikes the ground if we disregard air resistance?

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A light-year is the distance that light travels in one year. The speed of light is 3.00 × 10⁸ m/s. How many miles are there in one light-year? (1 mi = 1609 m, 1 y = 365 d)

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Correct Answer
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Correct Answer
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A car that is initially moving at 7.50 m/s begins to accelerate forward uniformly at 0.550 m/s². (a) How long after beginning to accelerate does it take the car to move 3.50 km? (b) How fast is the car moving just as it has traveled 3.50 km?

Correct Answer
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(a) 1.00 ×...
View Answer

A laser is thrown upward with a speed of 12 m/s on the surface of planet X where the acceleration due to gravity is 1.5 m/s² and there is no atmosphere. How long does it take for the laser to reach the maximum height?

Correct Answer
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Correct Answer
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Correct Answer
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An object moving in the +x direction experiences an acceleration of +2.0 m/s². This means the object

Correct Answer
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Correct Answer
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Correct Answer
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A car moving initially with speed v₀ slows down with an acceleration of magnitude a and comes to a full stop after traveling a distance d. What was the speed of the car when it had traveled half that distance, d/2?

Correct Answer
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Correct Answer
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Correct Answer
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A car accelerates from $5.0 \mathrm {~m} / \mathrm { s }$ to $21 \mathrm {~m} / \mathrm { s }$ at a constant rate of $3.0 \mathrm {~m} / \mathrm { s } ^ { 2 }$ How far does it travel while accelerating?

Correct Answer
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Correct Answer
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A test rocket at ground level is fired straight up from rest with a net upward acceleration of 20 m/s². After 4.0 s, the motor turns off but the rocket continues to coast upward with insignificant air resistance. What maximum elevation does the rocket reach?

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Correct Answer
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(a) 10 m/s...
View Answer

Correct Answer
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