Question 1

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

Question 2

A bullet shot straight up returns to its starting point in 10 s.What is the initial speed of the bullet,assuming negligible air resistance?

Accepted Answer

A) 9.8 m/s 
B) 25 m/s 
C) 49 m/s 
D) 98 m/s 
A) 9.8 m/s 
B) 25 m/s 
C) 49 m/s 
D) 98 m/s

Question 3

Two objects are dropped from a bridge,an interval of 1.0 s apart.Air resistance is negligible.During the time that both objects continue to fall,their separation

Accepted Answer

A) increases. 
B) decreases. 
C) stays constant. 
D) increases at first,but then stays constant. 
E) decreases at first,but then stays constant. 
A) increases. 
B) decreases. 
C) stays constant. 
D) increases at first,but then stays constant. 
E) decreases at first,but then stays constant.

Question 4

A car is traveling with a constant speed of 30.0 m/s when the driver suddenly applies the brakes,causing the car to slow down with a constant acceleration.The car comes to a stop in a distance of 120 m.What was the acceleration of the car as it slowed down?

Accepted Answer

A) 3.75 m/s2 
B) 4.00 m/s2 
C) 4.25 m/s2 
D) 4.50 m/s2 
E) 4.75 m/s2 
A) 3.75 m/s2 
B) 4.00 m/s2 
C) 4.25 m/s2 
D) 4.50 m/s2 
E) 4.75 m/s2

Question 5

If the position versus time graph of an object is a horizontal line,the object is

Accepted Answer

A) moving with constant non-zero speed. 
B) moving with constant non-zero acceleration. 
C) at rest. 
D) moving with increasing speed. 
A) moving with constant non-zero speed. 
B) moving with constant non-zero acceleration. 
C) at rest. 
D) moving with increasing speed.

Question 6

The figure shows a graph of the position x of two cars,C and D,as a function of time t.  
According to this graph,which statements about these cars must be true? (There could be more than one correct choice. )

Accepted Answer

A) The magnitude of the acceleration of car C is greater than the magnitude of the acceleration of car D. 
B) The magnitude of the acceleration of car C is less than the magnitude of the acceleration of car D. 
C) At time t = 10 s,both cars have the same velocity. 
D) Both cars have the same acceleration. 
E) The cars meet at time t = 10 s. 
A) The magnitude of the acceleration of car C is greater than the magnitude of the acceleration of car D. 
B) The magnitude of the acceleration of car C is less than the magnitude of the acceleration of car D. 
C) At time t = 10 s,both cars have the same velocity. 
D) Both cars have the same acceleration. 
E) The cars meet at time t = 10 s.

Question 7

Acceleration is sometimes expressed in multiples of g,where g= 9.8 m/s2. 
Is the acceleration of an object due to the earth's gravity.In a car crash,the car's forward velocity may go from 29 m/s.  To 0 m/s. 
In 0.15 s How many g's are experienced,on average,by the driver?

Accepted Answer

A) 20 g 
B) 14 g 
C) 24 g 
D) 26 g 
A) 20 g 
B) 14 g 
C) 24 g 
D) 26 g

Question 8

When is the average velocity of an object equal to the instantaneous velocity?

Accepted Answer

A) only when the velocity is increasing at a constant rate 
B) only when the velocity is decreasing at a constant rate 
C) when the velocity is constant 
D) always 
E) never 
A) only when the velocity is increasing at a constant rate 
B) only when the velocity is decreasing at a constant rate 
C) when the velocity is constant 
D) always 
E) never

Question 9

An object is thrown upwards with a speed of 13 m/s.How long does it take to reach a height of 4.0 m above the projection point while descending? Neglect air resistance.

Accepted Answer

A) 0.42 s 
B) 1.2 s 
C) 2.3 s 
D) 3.1 s 
E) 4.2 s 
A) 0.42 s 
B) 1.2 s 
C) 2.3 s 
D) 3.1 s 
E) 4.2 s

Question 10

Two identical objects A and B fall from rest from different heights to the ground.If object B takes twice as long as object A to reach the ground,what is the ratio of the heights from which A and B fell? Neglect air resistance.

Accepted Answer

A) hA/hB = 1/   
B) hA/hB = 1/2 
C) hA/hB = 1/4 
D) hA/hB = 1/8 
A) hA/hB = 1/   
B) hA/hB = 1/2 
C) hA/hB = 1/4 
D) hA/hB = 1/8

Question 11

Abby throws a ball straight up and times it.She sees that the ball goes by the top of a flagpole after 0.50 s and reaches the level of the top of the pole after a total elapsed time of 4.1 s.What was the speed of the ball at launch? Neglect air resistance.

Accepted Answer

A) 11 m/s 
B) 23 m/s 
C) 34 m/s 
D) 45 m/s 
E) 48 m/s 
A) 11 m/s 
B) 23 m/s 
C) 34 m/s 
D) 45 m/s 
E) 48 m/s

Question 12

If the velocity versus time graph of an object is a straight line making an angle of +30° (counter clockwise)with the time axis,the object is

Accepted Answer

A) moving with constant non-zero speed. 
B) moving with constant non-zero acceleration. 
C) at rest. 
D) moving with increasing acceleration. 
A) moving with constant non-zero speed. 
B) moving with constant non-zero acceleration. 
C) at rest. 
D) moving with increasing acceleration.

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

A hammer is thrown upward with a speed of 14 m/s on the surface of planet X where the acceleration due to gravity is 3.5 m/s2 and there is no atmosphere.What is the speed of the hammer after 8.0 s?

Accepted Answer

A) 7.0 m/s 
B) 14 m/s 
C) 21 m/s 
D) 64 m/s 
A) 7.0 m/s 
B) 14 m/s 
C) 21 m/s 
D) 64 m/s

Question 15

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 m 
A) 18 m 
B) 20 m 
C) 40 m 
D) 80 m

Question 16

A cart with an initial velocity of 5.0 m/s to the right experiences a constant acceleration of 2.0 m/s2 to the right.What is the cart's displacement during the first 6.0 s of this motion?

Accepted Answer

A) 10 m 
B) 55 m 
C) 66 m 
D) 80 m 
A) 10 m 
B) 55 m 
C) 66 m 
D) 80 m

Question 17

A 10-kg rock and a 20-kg rock are dropped at the same time and experience no significant air resistance.If the 10-kg rock falls with acceleration a,what is the acceleration of the 20-kg rock?

Accepted Answer

A) 4a 
B) 2a 
C) a 
D) a/2 
E) a/4 
A) 4a 
B) 2a 
C) a 
D) a/2 
E) a/4

Question 18

A baseball is hit with a bat and,as a result,its direction is completely reversed and its speed is doubled.If the actual contact with the bat lasts 0.45 s,what is the ratio of the magnitude of the average acceleration of the ball to its original speed?

Accepted Answer

A) 6.7 s-1 
B) 4.4 s-1 
C) 2.2 s-1 
D) 0.15 s-1 
A) 6.7 s-1 
B) 4.4 s-1 
C) 2.2 s-1 
D) 0.15 s-1

Question 19

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

Question 20

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

Exam 2: One-Dimensional Kinematics

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

A bullet shot straight up returns to its starting point in 10 s.What is the initial speed of the bullet,assuming negligible air resistance?

Two objects are dropped from a bridge,an interval of 1.0 s apart.Air resistance is negligible.During the time that both objects continue to fall,their separation

A car is traveling with a constant speed of 30.0 m/s when the driver suddenly applies the brakes,causing the car to slow down with a constant acceleration.The car comes to a stop in a distance of 120 m.What was the acceleration of the car as it slowed down?

If the position versus time graph of an object is a horizontal line,the object is

The figure shows a graph of the position x of two cars,C and D,as a function of time t. According to this graph,which statements about these cars must be true? (There could be more than one correct choice. )

Acceleration is sometimes expressed in multiples of g,where g= 9.8 m/s2. Is the acceleration of an object due to the earth's gravity.In a car crash,the car's forward velocity may go from 29 m/s. To 0 m/s. In 0.15 s How many g's are experienced,on average,by the driver?

When is the average velocity of an object equal to the instantaneous velocity?

An object is thrown upwards with a speed of 13 m/s.How long does it take to reach a height of 4.0 m above the projection point while descending? Neglect air resistance.

Two identical objects A and B fall from rest from different heights to the ground.If object B takes twice as long as object A to reach the ground,what is the ratio of the heights from which A and B fell? Neglect air resistance.

Abby throws a ball straight up and times it.She sees that the ball goes by the top of a flagpole after 0.50 s and reaches the level of the top of the pole after a total elapsed time of 4.1 s.What was the speed of the ball at launch? Neglect air resistance.

If the velocity versus time graph of an object is a straight line making an angle of +30° (counter clockwise)with the time axis,the object is

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

A hammer is thrown upward with a speed of 14 m/s on the surface of planet X where the acceleration due to gravity is 3.5 m/s2 and there is no atmosphere.What is the speed of the hammer after 8.0 s?

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?

A cart with an initial velocity of 5.0 m/s to the right experiences a constant acceleration of 2.0 m/s2 to the right.What is the cart's displacement during the first 6.0 s of this motion?

A 10-kg rock and a 20-kg rock are dropped at the same time and experience no significant air resistance.If the 10-kg rock falls with acceleration a,what is the acceleration of the 20-kg rock?

A baseball is hit with a bat and,as a result,its direction is completely reversed and its speed is doubled.If the actual contact with the bat lasts 0.45 s,what is the ratio of the magnitude of the average acceleration of the ball to its original speed?

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?

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

Introduction to Physics

Vectors in Physics

Two-Dimensional Kinematics

Newtons Laws of Motion

Applications of Newtons Laws

Work and Kinetic Energy

Potential Energy and Conservation of Energy

Linear Momentum and Collisions

Rotational Kinematics and Energy

Rotational Dynamics and Static Equilibrium

Gravity

Oscillations About Equilibrium

Waves and Sound

Fluids

Temperature and Heat

Phases and Phase Changes

The Laws of Thermodynamics

Electric Charges, Forces, and Fields

Electric Potential and Electric

Electric Current and Direct-Current Circuits

Magnetism

Magnetic Flux and Faradays Law of Induction

Alternating-Current Circuits

Electromagnetic Waves

Geometrical Optics

Optical Instruments

Physical Optics: Interference and Diffraction

Relativity

Quantum Physics

Atomic Physics

Nuclear Physics and Nuclear Radiation

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Acceleration is sometimes expressed in multiples of g,where g= 9.8 m/s². Is the acceleration of an object due to the earth's gravity.In a car crash,the car's forward velocity may go from 29 m/s. To 0 m/s. In 0.15 s How many g's are experienced,on average,by the driver?

A hammer is thrown upward with a speed of 14 m/s on the surface of planet X where the acceleration due to gravity is 3.5 m/s² and there is no atmosphere.What is the speed of the hammer after 8.0 s?

A cart with an initial velocity of 5.0 m/s to the right experiences a constant acceleration of 2.0 m/s² to the right.What is the cart's displacement during the first 6.0 s of this motion?

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?