Question 1

If a non-rotating object has no acceleration, then we can say for certain that it is

Accepted Answer

A)   moving at constant non-zero velocity.
B)   in mechanical equilibrium.
C)   at rest.
D)   all of these
E)   none of theseF) A) and C)
G) B) and D)

Question 2

A person is attracted toward the center of the Earth by a 500-N gravitational force. The Earth is attracted toward the person with a force of

Accepted Answer

A)   1000 N.
B)   zero.
C)   250 N.
D)   500 N.E) A) and B)
F) A) and C)

Question 3

A automobile and a baby carriage traveling at the same speed collide head-on. The impact force is

Accepted Answer

A)   greater on the baby carriage.
B)   greater on the automobile.
C)   the same for both.D) A) and B)
E) All of the above

Question 4

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)   10.
B)   5.
C)   1.
D)   2.
E)   none of theseF) A) and E)
G) A) and B)

Question 5

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)   volume.
C)   mass.
D)   all of these
E)   none of theseF) D) and E)
G) B) and E)

Question 6

A sack of potatoes weighing 200 N falls from an airplane. As the velocity of fall increases, air resistance also increases. When air resistance equals 200 N, the sack's acceleration in meters per second per second is

Accepted Answer

A)   0.
B)   9.8.
C)   4.9.
D)   infinite.
E)   none of theseF) All of the above
G) B) and C)

Question 7

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

Accepted Answer

A)   indicate exactly half your weight.
B)   indicate different values that will equal your weight when added together.
C)   indicate part of your total weight but not necessarily half of it.
D)   Any of the above may be correct.E) None of the above
F) A) and B)

Question 8

The brakes of a speeding truck are slammed on and it skids to a stop. If the truck were heavily loaded so that it had twice the total mass, the skidding distance would be

Accepted Answer

A)   1 1/2 times as far.
B)   1/2 as far.
C)   2 times as far.
D)   4 times as far.
E)   the same.F) A) and D)
G) None of the above

Question 9

Two people, one twice as massive as the other, attempt a tug-of- war with 12 meters of massless rope on frictionless ice. After a brief time, they meet. The heavier person slides a distance of

Accepted Answer

A)   4 m.
B)   6 m.
C)   0 m.
D)   3 m.E) All of the above
F) A) and D)

Question 10

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

Accepted Answer

A)   10 N.
B)   more than 10 N.
C)   less than 10 N.D) All of the above
E) B) and C)

Question 11

A vehicle that weighs 4000 N on the surface of the Earth is travelling in outer space at a speed of 200 m/s. The smallest constant force that must be applied to stop it in 20 seconds is

Accepted Answer

A)   4000 N.
B)   40 N.
C)   400 N.
D)   20 N.
E)   more than 4000 N.F) C) and D)
G) None of the above

Question 12

An object is propelled along a straight-line path by a force. If the net force were doubled, the object's acceleration would be

Accepted Answer

A)   half as much.
B)   twice as much.
C)   four times as much.
D)   the same.
E)   none of these.F) A) and B)
G) A) and C)

Question 13

A 10-kilogram block with an initial velocity of 10 m/s slides 10 meters across a horizontal surface and comes to rest. It takes the block 2 seconds to stop. The stopping force acting on the block is
About

Accepted Answer

A)   25 N.
B)   10 N.
C)   50 N.
D)   5 N.
E)   none of theseF) A) and B)
G) A) and E)

Question 14

During the time of the year when the Earth starts moving closer to the sun, the sun

Accepted Answer

A)   moves toward the Earth but a larger distance.
B)   moves toward the Earth, but a smaller distance.
C)   starts moving the same distance toward the Earth.
D)   does not move at all in response to the Earth's approach.E) A) and D)
F) A) and C)

Question 15

The human body can, under certain conditions, withstand an acceleration of 10 g. What net force would produce this acceleration of a 50-kg person?

Accepted Answer

A)   about 5000 N
B)   about 25,000 N
C)   about 500 N
D)   aAbout 2500 N
E)   none of theseF) A) and D)
G) A) and E)

Question 16

An coconut and a feather fall from a tree through the air to the ground below. The amount of air-resistance force is

Accepted Answer

A)   greater on the feather.
B)   greater on the coconut.
C)   the same on each.D) All of the above
E) A) and C)

Question 17

A car traveling at 22 m/s comes to an abrupt halt in 0.1 second when it hits a tree. What is the deceleration in meters per second per second of the car?

Accepted Answer

A)   220
B)   800
C)   110
D)   880
E)   can't be solved without the mass of the carF) A) and D)
G) None of the above

Question 18

A bag of groceries has a mass of 10 kilograms and a weight of

Accepted Answer

A)   about 1 N.
B)   about 1000 N.
C)   about 100 N.
D)   about 10 N.
E)   more than 1000 N.F) All of the above
G) B) and E)

Question 19

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 weight of the car is independent of gravity.
B)   the mass of the car is independent of gravity.
C)   Nonsense! A car is much more easily accelerated on the moon than on the Earth.D) None of the above
E) A) and B)

Question 20

In which case would you have the largest mass of gold? If your chunk of gold weighed 1 N on the

Accepted Answer

A)   Earth.
B)   planet Jupiter.
C)   moon.D) All of the above
E) None of the above

Exam 4: Newtons Laws of Motion

A sack of potatoes weighing 200 N falls from an airplane. As the velocity of fall increases, air resistance also increases. When air resistance equals 200 N, the sack's acceleration in meters per second per second is

Correct AnswerverifiedShow Answer

A bag of groceries has a mass of 10 kilograms and a weight of

Correct AnswerverifiedShow Answer

A person is attracted toward the center of the Earth by a 500-N gravitational force. The Earth is attracted toward the person with a force of

Correct AnswerverifiedShow Answer

An coconut and a feather fall from a tree through the air to the ground below. The amount of air-resistance force is

Correct AnswerverifiedShow Answer

During the time of the year when the Earth starts moving closer to the sun, the sun

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The human body can, under certain conditions, withstand an acceleration of 10 g. What net force would produce this acceleration of a 50-kg person?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A vehicle that weighs 4000 N on the surface of the Earth is travelling in outer space at a speed of 200 m/s. The smallest constant force that must be applied to stop it in 20 seconds is

Correct AnswerverifiedShow Answer

Two people, one twice as massive as the other, attempt a tug-of- war with 12 meters of massless rope on frictionless ice. After a brief time, they meet. The heavier person slides a distance of

Correct AnswerverifiedShow Answer

A car traveling at 22 m/s comes to an abrupt halt in 0.1 second when it hits a tree. What is the deceleration in meters per second per second of the car?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A automobile and a baby carriage traveling at the same speed collide head-on. The impact force is

Correct AnswerverifiedShow Answer

A 10-kilogram block with an initial velocity of 10 m/s slides 10 meters across a horizontal surface and comes to rest. It takes the block 2 seconds to stop. The stopping force acting on the block is About

Correct AnswerverifiedShow Answer

An object is propelled along a straight-line path by a force. If the net force were doubled, the object's acceleration would be

Correct AnswerverifiedShow Answer

The brakes of a speeding truck are slammed on and it skids to a stop. If the truck were heavily loaded so that it had twice the total mass, the skidding distance would be

Correct AnswerverifiedShow Answer

If a non-rotating object has no acceleration, then we can say for certain that it is

Correct AnswerverifiedShow Answer

In which case would you have the largest mass of gold? If your chunk of gold weighed 1 N on the

Correct AnswerverifiedShow Answer

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