Question 1

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) B) and D)
F) A) and B)

Question 2

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) All of the above
F) A) and D)

Question 3

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) A) and B)
F) All of the above

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) All of the above
F) None of the above

Question 5

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) C) and D)
F) B) and C)

Question 6

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 7

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) B) and E)
G) B) and C)

Question 8

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 9

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) None of the above
F) B) and D)

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) A) and E)
G) A) and D)

Question 11

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 E)

Question 12

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) None of the above
F) All of the above

Question 13

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) All of the above
F) A) and B)

Question 14

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 15

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) None of the above
F) All of the above

Question 16

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) A) and B)
F) A) and C)

Question 17

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) C) and D)
F) A) and D)

Question 18

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) A) and B)
G) A) and D)

Question 19

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) All of the above

Question 20

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 B)
G) B) and D)

Exam 2: Motion in One Dimension

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

Correct AnswerverifiedShow Answer

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?

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

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?

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

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

The slope of a velocity versus time graph gives

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

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?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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)

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 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 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?

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?

Correct AnswerverifiedShow 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?

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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 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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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
verified

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
verified

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

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)

Correct Answer
verified

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 Answer
verified

Correct Answer
verified

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?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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
verified

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

Correct Answer
verified

Correct Answer
verified

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
verified
(a) 1.00 ×...
View Answer