Question 1

An object's weight may properly be expressed in units of

Accepted Answer

A) meters. 
B) kilograms. 
C) newtons. 
D) cubic centimeters. 
A) meters. 
B) kilograms. 
C) newtons. 
D) cubic centimeters. C

Question 2

When a woman stands at rest with both feet on a scale,it reads 500 N.When she gently lifts one foot,the scale reads

Accepted Answer

A) less than 500 N. 
B) more than 500 N. 
C) 500 N. 
A) less than 500 N. 
B) more than 500 N. 
C) 500 N. C

Question 3

A large and a small person wish to parachute at equal terminal velocities.The larger person will have to

Accepted Answer

A) get a larger parachute. 
B) jump lightly. 
C) pull upward on the supporting strands to decrease the downward net force. 
D) jump first from the plane. 
A) get a larger parachute. 
B) jump lightly. 
C) pull upward on the supporting strands to decrease the downward net force. 
D) jump first from the plane. A

Question 4

A 1-kg rock that weighs 9.8 N is thrown straight upward at 20 m/s.Neglecting air resistance,the net force that acts on it when it is half way to the top of its path is

Accepted Answer

A) less than 9.8 N. 
B) 9)8 N. 
C) more than 9.8 N. 
A) less than 9.8 N. 
B) 9)8 N. 
C) more than 9.8 N.

Question 5

A light woman and a heavy man jump from an airplane at the same time and open their same-size parachutes at the same time.Which person will get to a state of zero acceleration first?

Accepted Answer

A) the light woman 
B) the heavy man 
C) Both should arrive at the same time. 
D) not enough information 
A) the light woman 
B) the heavy man 
C) Both should arrive at the same time. 
D) not enough information

Question 6

Strange as it may seem,it is just as hard to accelerate a car on a level surface on the moon as it is here on the Earth.This is because

Accepted Answer

A) the mass of the car is independent of gravity. 
B) the weight of the car is independent of gravity. 
C) Nonsense! A car is much more easily accelerated on the moon than on the Earth. 
A) the mass of the car is independent of gravity. 
B) the weight of the car is independent of gravity. 
C) Nonsense! A car is much more easily accelerated on the moon than on the Earth.

Question 7

If the mass of an object does not change,a constant net force on the object produces constant

Accepted Answer

A) velocity. 
B) acceleration. 
C) both of these 
D) neither of these 
A) velocity. 
B) acceleration. 
C) both of these 
D) neither of these

Question 8

The force of friction on a sliding object is 10 newtons.The applied force needed to maintain a constant velocity is

Accepted Answer

A) more than 10 N. 
B) less than 10 N. 
C) 10 N. 
A) more than 10 N. 
B) less than 10 N. 
C) 10 N.

Question 9

A force is a vector quantity because it has both

Accepted Answer

A) magnitude and direction. 
B) mass and acceleration. 
C) action and reaction counterparts. 
A) magnitude and direction. 
B) mass and acceleration. 
C) action and reaction counterparts.

Question 10

A 1-kg mass at the Earth's surface weighs

Accepted Answer

A) 1 N. 
B) 4)9 N. 
C) 9)8 N. 
D) 10.8 N. 
E) none of these 
A) 1 N. 
B) 4)9 N. 
C) 9)8 N. 
D) 10.8 N. 
E) none of these

Question 11

A 10-N block and a 1-N block lie on a horizontal frictionless table.To provide them with equal horizontal acceleration,we would have to push with

Accepted Answer

A) equal forces on each block. 
B) 10 times as much force on the heavier block. 
C) 10 squared or 100 times as much force on the heavier block. 
D) 1/10 as much force on the heavier block. 
E) none of these 
A) equal forces on each block. 
B) 10 times as much force on the heavier block. 
C) 10 squared or 100 times as much force on the heavier block. 
D) 1/10 as much force on the heavier block. 
E) none of these

Question 12

Your weight is

Accepted Answer

A) equal to your mass. 
B) the gravitational attraction force between you and the Earth. 
C) a property of mechanical equilibrium. 
D) all of these 
A) equal to your mass. 
B) the gravitational attraction force between you and the Earth. 
C) a property of mechanical equilibrium. 
D) all of these

Question 13

A 1000-kg automobile enters a freeway on-ramp at 20 m/s and accelerates uniformly up to 40 m/s in a time of 10 seconds.How far does the automobile travel during that time?

Accepted Answer

A) 100 m 
B) 200 m 
C) 300 m 
D) 400 m 
E) none of these 
A) 100 m 
B) 200 m 
C) 300 m 
D) 400 m 
E) none of these

Question 14

A heavy block at rest is suspended by a vertical rope.When the block is accelerated upward by the rope,the rope tension

Accepted Answer

A) increases. 
B) decreases. 
C) remains the same. 
A) increases. 
B) decreases. 
C) remains the same.

Question 15

The newton is a unit of

Accepted Answer

A) force. 
B) mass. 
C) density. 
D) inertia. 
A) force. 
B) mass. 
C) density. 
D) inertia.

Question 16

An apple weighs 1 N.When held at rest above your head,the net force on the apple is

Accepted Answer

A) 0 N. 
B) 0)1 N. 
C) 1 N. 
D) 9)8 N. 
E) none of these 
A) 0 N. 
B) 0)1 N. 
C) 1 N. 
D) 9)8 N. 
E) none of these

Question 17

A ball is thrown vertically into the air.Because of air resistance,its speed when it returns to its starting level compared with its initial speed is

Accepted Answer

A) less. 
B) the same. 
C) more. 
A) less. 
B) the same. 
C) more.

Question 18

An astronaut on another planet drops a 1-kg rock from rest and finds that it falls a vertical distance of 2.5 meters in one second.On this planet,the rock has a weight of

Accepted Answer

A) 1 N. 
B) 2 N. 
C) 3 N. 
D) 4 N. 
E) 5 N. 
A) 1 N. 
B) 2 N. 
C) 3 N. 
D) 4 N. 
E) 5 N.

Question 19

When you relax at rest with your left foot on one bathroom scale and your right foot on a similar scale,each of the scales will

Accepted Answer

A) indicate exactly half your weight. 
B) indicate part of your total weight but not necessarily half of it. 
C) indicate different values that will equal your weight when added together. 
D) Any of the above may be correct. 
A) indicate exactly half your weight. 
B) indicate part of your total weight but not necessarily half of it. 
C) indicate different values that will equal your weight when added together. 
D) Any of the above may be correct.

Question 20

A girl pulls on a 10-kg wagon with a constant horizontal force of 30 N.If there are no other horizontal forces,what is the wagon's acceleration in meters per second per second?

Accepted Answer

A) 0)3 
B) 3)0 
C) 10 
D) 30 
E) 300 
A) 0)3 
B) 3)0 
C) 10 
D) 30 
E) 300

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

An object's weight may properly be expressed in units of

When a woman stands at rest with both feet on a scale,it reads 500 N.When she gently lifts one foot,the scale reads

A large and a small person wish to parachute at equal terminal velocities.The larger person will have to

A 1-kg rock that weighs 9.8 N is thrown straight upward at 20 m/s.Neglecting air resistance,the net force that acts on it when it is half way to the top of its path is

A light woman and a heavy man jump from an airplane at the same time and open their same-size parachutes at the same time.Which person will get to a state of zero acceleration first?

Strange as it may seem,it is just as hard to accelerate a car on a level surface on the moon as it is here on the Earth.This is because

If the mass of an object does not change,a constant net force on the object produces constant

The force of friction on a sliding object is 10 newtons.The applied force needed to maintain a constant velocity is

A force is a vector quantity because it has both

A 1-kg mass at the Earth's surface weighs

A 10-N block and a 1-N block lie on a horizontal frictionless table.To provide them with equal horizontal acceleration,we would have to push with

Your weight is

A 1000-kg automobile enters a freeway on-ramp at 20 m/s and accelerates uniformly up to 40 m/s in a time of 10 seconds.How far does the automobile travel during that time?

A heavy block at rest is suspended by a vertical rope.When the block is accelerated upward by the rope,the rope tension

The newton is a unit of

An apple weighs 1 N.When held at rest above your head,the net force on the apple is

A ball is thrown vertically into the air.Because of air resistance,its speed when it returns to its starting level compared with its initial speed is

An astronaut on another planet drops a 1-kg rock from rest and finds that it falls a vertical distance of 2.5 meters in one second.On this planet,the rock has a weight of

When you relax at rest with your left foot on one bathroom scale and your right foot on a similar scale,each of the scales will

A girl pulls on a 10-kg wagon with a constant horizontal force of 30 N.If there are no other horizontal forces,what is the wagon's acceleration in meters per second per second?

About Science

Newtons First Law of Motion: Inertia

Linear Motion

Newtons Third Law of Motion: Action and Reaction

Momentum

Energy

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Gravity

Projectile and Satellite Motion

Atomic Nature of Matter

Solids

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Gases and Plasmas

Temperature,heat,and Expansion

Heat Transfer

Change of Phase

Thermodynamics

Vibrations and Waves

Sound

Musical Sounds

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Electric Current

Magnetism

Electromagnetic Induction

Properties of Light

Color

Reflection and Refraction

Light Waves

Light Emission

Light Quanta

The Atom and the Quantum

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Special Theory of Relativity

General Theory of Relativity

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