Question 1

A kilogram is a measure of an object's

Accepted Answer

A) weight. 
B) force. 
C) mass. 
D) size. 
A) weight. 
B) force. 
C) mass. 
D) size.

Question 2

A skydiver of mass 100 kg experiences air resistance of 500 N,and an acceleration of

Accepted Answer

A) about 0.2 g. 
B) about 0.3 g. 
C) about 0.4 g. 
D) about 0.5 g. 
E) more than 0.5 g. 
A) about 0.2 g. 
B) about 0.3 g. 
C) about 0.4 g. 
D) about 0.5 g. 
E) more than 0.5 g.

Question 3

An object released from rest on another planet requires one second to fall a distance of 6 meters.What is the acceleration in meters per second per second due to gravity on this planet?

Accepted Answer

A) 3 
B) 6 
C) 12 
D) 15 
E) none of these 
A) 3 
B) 6 
C) 12 
D) 15 
E) none of these

Question 4

Suppose a particle is being accelerated through space by a 10-N force.Suddenly the particle encounters a second force of 10 N in the opposite direction from the first force.The particle with both forces acting on it

Accepted Answer

A) is brought to a rapid halt. 
B) decelerates gradually to a halt. 
C) continues at the speed it had when it encountered the second force. 
D) theoretically tends to accelerate toward the speed of light. 
E) none of these 
A) is brought to a rapid halt. 
B) decelerates gradually to a halt. 
C) continues at the speed it had when it encountered the second force. 
D) theoretically tends to accelerate toward the speed of light. 
E) none of these

Question 5

A 2000-kg car experiences a braking force of 10,000 N and skids to a stop in 6 seconds.The speed of the car just before the brakes were applied was

Accepted Answer

A) 1)2 m/s. 
B) 15 m/s. 
C) 30 m/s. 
D) 45 m/s. 
E) none of these 
A) 1)2 m/s. 
B) 15 m/s. 
C) 30 m/s. 
D) 45 m/s. 
E) none of these

Question 6

A feather and a coin will have equal accelerations when falling in a vacuum because

Accepted Answer

A) their velocities are the same. 
B) the force of gravity is the same for each in a vacuum. 
C) the force of gravity does not act in a vacuum. 
D) the ratio of each object's weight to its mass is the same. 
E) none of these 
A) their velocities are the same. 
B) the force of gravity is the same for each in a vacuum. 
C) the force of gravity does not act in a vacuum. 
D) the ratio of each object's weight to its mass is the same. 
E) none of these

Question 7

Compared to a 1-kg block of solid iron,a 2-kg block of solid iron has twice as much

Accepted Answer

A) inertia. 
B) mass. 
C) volume. 
D) all of these 
E) none of these 
A) inertia. 
B) mass. 
C) volume. 
D) all of these 
E) none of these

Question 8

A 10-kilogram block is pushed across a horizontal surface with a horizontal force of 20 N against a friction force of 10 N.The acceleration of the block in meters per second per second is

Accepted Answer

A) 1) 
B) 2) 
C) 5) 
D) 10. 
E) none of these 
A) 1) 
B) 2) 
C) 5) 
D) 10. 
E) none of these

Question 9

A ball thrown straight upward takes 10 seconds to go up and return to the ground.Because of air resistance,the time taken for the ball just to go up is

Accepted Answer

A) less than 5 s. 
B) more than 5 s. 
C) 5 s. 
A) less than 5 s. 
B) more than 5 s. 
C) 5 s.

Question 10

A skydiver's terminal velocity will be greatest if she falls

Accepted Answer

A) head first. 
B) lying flat on her back. 
C) lying flat on her stomach. 
D) with her parachute open. 
A) head first. 
B) lying flat on her back. 
C) lying flat on her stomach. 
D) with her parachute open.

Question 11

If more horizontal force is applied to a sliding object than is needed to maintain a constant velocity

Accepted Answer

A) the object accelerates in the direction of the applied force. 
B) the object accelerates opposite the direction of the applied force. 
C) the friction force increases. 
D) two of the above 
E) none of the above 
A) the object accelerates in the direction of the applied force. 
B) the object accelerates opposite the direction of the applied force. 
C) the friction force increases. 
D) two of the above 
E) none of the above

Question 12

A ride on a roller-coaster car containing 6 passengers takes 3 minutes.Neglecting friction,a similar ride with 12 passengers aboard would take

Accepted Answer

A) 1)5 minutes. 
B) 3 minutes. 
C) 6 minutes. 
D) 18 minutes. 
A) 1)5 minutes. 
B) 3 minutes. 
C) 6 minutes. 
D) 18 minutes.

Question 13

A skydiver jumps from a high-flying plane.As her velocity of fall increases,her acceleration

Accepted Answer

A) increases. 
B) decreases. 
C) remains unchanged regardless of air resistance. 
A) increases. 
B) decreases. 
C) remains unchanged regardless of air resistance.

Question 14

An object is propelled along a straight-line path in space by a force.If the mass of the object somehow becomes twice as much,its acceleration

Accepted Answer

A) quadruples. 
B) doubles. 
C) stays the same. 
D) halves. 
E) none of these 
A) quadruples. 
B) doubles. 
C) stays the same. 
D) halves. 
E) none of these

Question 15

Which has zero acceleration? An object

Accepted Answer

A) at rest. 
B) moving at constant velocity. 
C) in mechanical equilibrium. 
D) all of these 
E) none of these 
A) at rest. 
B) moving at constant velocity. 
C) in mechanical equilibrium. 
D) all of these 
E) none of these

Question 16

Your car is coasting on level ground at 60 km/h and you apply the brakes until the car slows to 40 km/h.If you suddenly release the brakes now,the car tends to

Accepted Answer

A) momentarily regain its higher initial speed. 
B) continue moving at 40 km/h. 
C) decrease in speed if no other forces act. 
A) momentarily regain its higher initial speed. 
B) continue moving at 40 km/h. 
C) decrease in speed if no other forces act.

Question 17

If one object has twice as much mass as another object,it also has twice as much

Accepted Answer

A) inertia. 
B) velocity. 
C) acceleration due to gravity. 
D) volume. 
E) all of these 
A) inertia. 
B) velocity. 
C) acceleration due to gravity. 
D) volume. 
E) all of these

Question 18

What horizontally-applied force will accelerate a 400-kg crate at 1 m/s2 across a factory floor against a friction force half its weight?

Accepted Answer

A) 600 N 
B) 1600 N 
C) 2000 N 
D) 2400 N 
E) none of these 
A) 600 N 
B) 1600 N 
C) 2000 N 
D) 2400 N 
E) none of these

Question 19

An object following a straight-line path at constant speed

Accepted Answer

A) has a net force acting upon it in the direction of motion. 
B) has zero acceleration. 
C) has no forces acting on it. 
D) none of these 
A) has a net force acting upon it in the direction of motion. 
B) has zero acceleration. 
C) has no forces acting on it. 
D) none of these

Question 20

A rock weighs 30 N on Earth.A second rock weighs 30 N on the moon.Which of the two rocks has the greater mass?

Accepted Answer

A) the one on Earth 
B) the one on the moon 
C) They have the same mass. 
D) not enough information to say 
A) the one on Earth 
B) the one on the moon 
C) They have the same mass. 
D) not enough information to say

Exam 4: Newtons Second Law of Motion: Force and Acceleration

A kilogram is a measure of an object's

A skydiver of mass 100 kg experiences air resistance of 500 N,and an acceleration of

An object released from rest on another planet requires one second to fall a distance of 6 meters.What is the acceleration in meters per second per second due to gravity on this planet?

Suppose a particle is being accelerated through space by a 10-N force.Suddenly the particle encounters a second force of 10 N in the opposite direction from the first force.The particle with both forces acting on it

A 2000-kg car experiences a braking force of 10,000 N and skids to a stop in 6 seconds.The speed of the car just before the brakes were applied was

A feather and a coin will have equal accelerations when falling in a vacuum because

Compared to a 1-kg block of solid iron,a 2-kg block of solid iron has twice as much

A 10-kilogram block is pushed across a horizontal surface with a horizontal force of 20 N against a friction force of 10 N.The acceleration of the block in meters per second per second is

A ball thrown straight upward takes 10 seconds to go up and return to the ground.Because of air resistance,the time taken for the ball just to go up is

A skydiver's terminal velocity will be greatest if she falls

If more horizontal force is applied to a sliding object than is needed to maintain a constant velocity

A ride on a roller-coaster car containing 6 passengers takes 3 minutes.Neglecting friction,a similar ride with 12 passengers aboard would take

A skydiver jumps from a high-flying plane.As her velocity of fall increases,her acceleration

An object is propelled along a straight-line path in space by a force.If the mass of the object somehow becomes twice as much,its acceleration

Which has zero acceleration? An object

Your car is coasting on level ground at 60 km/h and you apply the brakes until the car slows to 40 km/h.If you suddenly release the brakes now,the car tends to

If one object has twice as much mass as another object,it also has twice as much

What horizontally-applied force will accelerate a 400-kg crate at 1 m/s2 across a factory floor against a friction force half its weight?

An object following a straight-line path at constant speed

A rock weighs 30 N on Earth.A second rock weighs 30 N on the moon.Which of the two rocks has the greater mass?

About Science

Newtons First Law of Motion: Inertia

Linear Motion

Newtons Third Law of Motion: Action and Reaction

Momentum

Energy

Rotational Motion

Gravity

Projectile and Satellite Motion

Atomic Nature of Matter

Solids

Liquids

Gases and Plasmas

Temperature,heat,and Expansion

Heat Transfer

Change of Phase

Thermodynamics

Vibrations and Waves

Sound

Musical Sounds

Electrostatics

Electric Current

Magnetism

Electromagnetic Induction

Properties of Light

Color

Reflection and Refraction

Light Waves

Light Emission

Light Quanta

The Atom and the Quantum

Atomic Nucleus and Radioactivity

Nuclear Fission and Fusion

Special Theory of Relativity

General Theory of Relativity

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