Question 1

Suppose that a car traveling to the west begins to slow down as it approaches a traffic light. Which of the following statements about its acceleration is correct?

Accepted Answer

A) The acceleration is toward the east. 
B) Since the car is slowing down, its acceleration must be negative. 
C) The acceleration is zero. 
D) The acceleration is toward the west. 
A) The acceleration is toward the east. 
B) Since the car is slowing down, its acceleration must be negative. 
C) The acceleration is zero. 
D) The acceleration is toward the west.

Question 2

An airplane starts from rest and accelerates at a constant 10.8 m/s2. What is its speed at the end of a 400 m-long runway?

Accepted Answer

A) 37.0 m/s 
B) 93.0 m/s 
C) 65.7 m/s 
D) 4320 m/s 
E) 186 m/s 
A) 37.0 m/s 
B) 93.0 m/s 
C) 65.7 m/s 
D) 4320 m/s 
E) 186 m/s

Question 3

An airplane increases its speed at the average rate of 15 m/s2. How much time does it take to increase its speed from 100 m/s to 160 m/s?

Accepted Answer

A) 17 s 
B) 0.058 s 
C) 4.0 s 
D) 0.25 s 
A) 17 s 
B) 0.058 s 
C) 4.0 s 
D) 0.25 s

Question 4

An object is thrown upwards with a speed of 16 m/s. How long does it take it to reach a height of 7.0 m on the way up? Neglect air resistance.

Accepted Answer

A) 0.52 s 
B) 1.2 s 
C) 2.4 s 
D) 3.1 s 
E) 4.2 s 
A) 0.52 s 
B) 1.2 s 
C) 2.4 s 
D) 3.1 s 
E) 4.2 s

Question 5

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 m 
A) 160 m 
B) 330 m 
C) 320 m 
D) 410 m 
E) 490 m

Question 6

The motion of a particle is described in the velocity vs. time graph shown in the figure.   Over the nine-second interval shown, we can say that the speed of the particle

Accepted Answer

A) only increases. 
B) only decreases. 
C) increases and then decreases. 
D) decreases and then increases. 
E) remains constant. 
A) only increases. 
B) only decreases. 
C) increases and then decreases. 
D) decreases and then increases. 
E) remains constant.

Question 7

A ball is thrown upward at a velocity of 19.6 m/s. What is its velocity after 3.0 s, assuming negligible air resistance?

Accepted Answer

A) 9.8 m/s upward 
B) 9.8 m/s downward 
C) 0 m/s 
D) 19.6 m/s downward 
A) 9.8 m/s upward 
B) 9.8 m/s downward 
C) 0 m/s 
D) 19.6 m/s downward

Question 8

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

The answer of The figure shows a graph of the...

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) 1.14 
A) 0.937 
B) 1.07 
C) 0.878 
D) 1.14

Question 10

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

Accepted Answer

(a)0.67 m/

Question 11

The slope of a velocity versus time graph gives

Accepted Answer

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

Question 12

An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi/h north for 750 miles. What is the average speed for the trip?

Accepted Answer

A) 260 mi/h 
B) 270 mi/h 
C) 275 mi/h 
D) 280 mi/h 
A) 260 mi/h 
B) 270 mi/h 
C) 275 mi/h 
D) 280 mi/h

Question 13

The graph in the figure shows the position of an object as a function of time. The letters H-L represent particular moments of time.   (a)At which moment in time is the speed of the object the greatest?
(b)At which moment in time is the speed of the object equal to zero?

Accepted Answer

The answer of The graph in the figure shows the...

Question 14

Suppose that an object travels from one point in space to another. Make a comparison between the magnitude of the displacement and the distance traveled by this object.

Accepted Answer

A) The displacement is either greater than or equal to the distance traveled. 
B) The displacement is always equal to the distance traveled. 
C) The displacement is either less than or equal to the distance traveled. 
D) The displacement can be either greater than, smaller than, or equal to the distance traveled. 
A) The displacement is either greater than or equal to the distance traveled. 
B) The displacement is always equal to the distance traveled. 
C) The displacement is either less than or equal to the distance traveled. 
D) The displacement can be either greater than, smaller than, or equal to the distance traveled.

Question 15

Suppose a ball is thrown straight up and experiences no appreciable air resistance. What is its acceleration just before it reaches its highest point?

Accepted Answer

A) zero 
B) slightly less than g 
C) exactly g 
D) slightly greater than g 
A) zero 
B) slightly less than g 
C) exactly g 
D) slightly greater than g

Question 16

A cart starts from rest and accelerates uniformly at 4.0 m/s2 for 5.0 s. It next maintains the velocity it has reached for 10 s. Then it slows down at a steady rate of 2.0 m/s2 for 4.0 s. What is the final speed of the car?

Accepted Answer

A) 20 m/s 
B) 16 m/s 
C) 12 m/s 
D) 10 m/s 
A) 20 m/s 
B) 16 m/s 
C) 12 m/s 
D) 10 m/s

Question 17

If the acceleration of an object is zero, then that object cannot be moving.

Accepted Answer

A) True 
 B)False

Question 18

A ball is thrown straight up, reaches a maximum height, then falls to its initial height. Which of the following statements about the direction of the velocity and acceleration of the ball as it is going up is correct?

Accepted Answer

A) Both its velocity and its acceleration point upward. 
B) Its velocity points upward and its acceleration points downward. 
C) Its velocity points downward and its acceleration points upward. 
D) Both its velocity and its acceleration points downward. 
A) Both its velocity and its acceleration point upward. 
B) Its velocity points upward and its acceleration points downward. 
C) Its velocity points downward and its acceleration points upward. 
D) Both its velocity and its acceleration points downward.

Question 19

If a car accelerates at a uniform 4.0 m/s2, how long will it take to reach a speed of 80 km/hr, starting from rest?

Accepted Answer

Question 20

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 s 
A) 8.0 s 
B) 11 s 
C) 14 s 
D) 16 s

Exam 2: Motion in One Dimension

Suppose that a car traveling to the west begins to slow down as it approaches a traffic light. Which of the following statements about its acceleration is correct?

An airplane starts from rest and accelerates at a constant 10.8 m/s2. What is its speed at the end of a 400 m-long runway?

An airplane increases its speed at the average rate of 15 m/s2. How much time does it take to increase its speed from 100 m/s to 160 m/s?

An object is thrown upwards with a speed of 16 m/s. How long does it take it to reach a height of 7.0 m on the way up? Neglect air resistance.

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?

The motion of a particle is described in the velocity vs. time graph shown in the figure. Over the nine-second interval shown, we can say that the speed of the particle

A ball is thrown upward at a velocity of 19.6 m/s. What is its velocity after 3.0 s, assuming negligible air resistance?

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

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?

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

The slope of a velocity versus time graph gives

An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi/h north for 750 miles. What is the average speed for the trip?

The graph in the figure shows the position of an object as a function of time. The letters H-L represent particular moments of time. (a)At which moment in time is the speed of the object the greatest? (b)At which moment in time is the speed of the object equal to zero?

Suppose that an object travels from one point in space to another. Make a comparison between the magnitude of the displacement and the distance traveled by this object.

Suppose a ball is thrown straight up and experiences no appreciable air resistance. What is its acceleration just before it reaches its highest point?

A cart starts from rest and accelerates uniformly at 4.0 m/s2 for 5.0 s. It next maintains the velocity it has reached for 10 s. Then it slows down at a steady rate of 2.0 m/s2 for 4.0 s. What is the final speed of the car?

If the acceleration of an object is zero, then that object cannot be moving.

A ball is thrown straight up, reaches a maximum height, then falls to its initial height. Which of the following statements about the direction of the velocity and acceleration of the ball as it is going up is correct?

If a car accelerates at a uniform 4.0 m/s2, how long will it take to reach a speed of 80 km/hr, starting from rest?

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?

Representing Motion

Vectors and Motion in Two Dimensions

Forces and Newtons Laws of Motion

Applying Newtons Laws

Gravity

Rotational Motion

Equilibrium Ad Elasticity

Momentum

Energy and Work

Using Energy

Thermal Properties of Matter

Fluids

Oscillations

Traveling Waves and Sound

Superposition and Standing Waves

Wave Optics

Ray Optics

Optical Instruments

Electric Fields and Forces

Electric Potential

Current and Resistance

Circuits

Magnetic Fields and Forces

Em Induction and Em Waves

Ac Electricity

Relativity

Quantum Physics

Atoms and Molecules

Nuclear Physics

Filters

An airplane starts from rest and accelerates at a constant 10.8 m/s². What is its speed at the end of a 400 m-long runway?

An airplane increases its speed at the average rate of 15 m/s². How much time does it take to increase its speed from 100 m/s to 160 m/s?

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?

A cart starts from rest and accelerates uniformly at 4.0 m/s² for 5.0 s. It next maintains the velocity it has reached for 10 s. Then it slows down at a steady rate of 2.0 m/s² for 4.0 s. What is the final speed of the car?

If a car accelerates at a uniform 4.0 m/s², how long will it take to reach a speed of 80 km/hr, starting from rest?

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?