Question 1

A 10-kg brick and a 1-kg book are dropped in a vacuum.The acceleration of the 10-kg brick is

Accepted Answer

A)  the same as that of the 1-kg book.
B)  5 times as much as for the 1-kg book.
C)  10 times as much as for the 1-kg book.
D)  zero.

Question 2

A commercial jet has a mass of 5000 kg.During takeoff the thrust of its engine is 10,000 N,producing an acceleration of

Accepted Answer

A)  0.5 m/s2.
B)  1 m/s2.
C)  2 m/s2.
D)  4 m/s2.
E)  none of the above

Question 3

A heavy rock and a light rock in free fall have the same acceleration because the

Accepted Answer

A)  force due to gravity is the same on each.
B)  air resistance is always zero in free fall.
C)  inertia of each is the same.
D)  ratio of force to mass is the same.
E)  none of the above

Question 4

What applied horizontal 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 the above

Question 5

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

Accepted Answer

A)  3 m.
B)  4 m.
C)  5 m.
D)  6 m.

Question 6

A push on a 1-kg brick accelerates the brick.Neglecting friction,to equally accelerate a 10-kg brick requires the force to be

Accepted Answer

A)  just as much.
B)  10 times as much.
C)  100 times as much.
D)  one-tenth as much.
E)  none of the above

Question 7

Lillian pulls on a 10-kg wagon with a constant force of 30 N.What is the wagon's acceleration?

Accepted Answer

A)  0.3 m/s2
B)  3.0 m/s2
C)  10 m/s2
D)  30 m/s2
E)  300 m/s2

Question 8

When a boulder and a pebble are dropped,why does the pebble pick up speed as quickly as the boulder,even though less gravity acts on it? In other words,why do both accelerate equally?

Accepted Answer

Acceleration depends not only on the for...

Question 9

Whirl a rock at the end of a string and it follows a circular path.If the string breaks,the rock tends at first to

Accepted Answer

A)  continue in a circular path.
B)  follow a straight-line path.
C)  spiral inward.
D)  fall straight downward.

Question 10

Why will girls wearing gym shoes win in a tug-of-war against boys wearing socks while the activity occurs on a smooth floor?

Accepted Answer

In any tug of war,the tension on both en...

Question 11

The net force on any object moving at constant velocity is

Accepted Answer

A)  zero.
B)  10 meters per second squared.
C)  equal to its weight.
D)  about half its weight.

Question 12

A physicist says that a car accelerating along a level road is being propelled by the road.Defend this statement.

Accepted Answer

It's true.The tires are made to rotate b...

Question 13

A 10-kg brick and a 1-kg book are dropped in a vacuum.The force of gravity on the 10-kg brick is

Accepted Answer

A)  the same as the force on the 1-kg book.
B)  5 times as much as the force on the 1-kg book.
C)  10 times as much as the force on the 1-kg book.
D)  zero.

Question 14

A car by itself is capable of a certain maximum acceleration.When it tows a twice-as-massive car,its maximum acceleration is

Accepted Answer

A)  one-half.
B)  one-third.
C)  one-fourth.
D)  the same.
E)  none of these

Question 15

A tow truck exerts a force of 3000 N on a car that accelerates at 2 m/s2.What is the mass of the car?

Accepted Answer

A)  500 kg
B)  1000 kg
C)  1500 kg
D)  3000 kg
E)  none of these

Question 16

After a ball tossed upward leaves your hand,the force of gravity on it

Accepted Answer

A)  no longer acts.
B)  gradually diminishes.
C)  gradually increases.
D)  remains constant.
E)  changes direction.

Question 17

The emphasis of the orange-and-apple sequence in your text is

Accepted Answer

A)  to define systems.
B)  that actions equal reactions.
C)  that forces produce accelerations.
D)  defining friction as a force.
E)  that mass is not a force.

Question 18

A ball is thrown vertically into the air.Because of air resistance,its time coming down compared with its time going up is

Accepted Answer

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

Question 19

The force required to maintain an object at a constant velocity in free space is equal to

Accepted Answer

A)  zero.
B)  the mass of the object.
C)  the weight of the object.
D)  the force required to stop it.

Question 20

A 10-kg 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 is

Accepted Answer

A)  1 m/s2.
B)  2 m/s2.
C)  5 m/s2.
D)  10 m/s2.
E)  none of the above

Exam 2: Newtons Laws of Motion

A ball is thrown vertically into the air.Because of air resistance,its time coming down compared with its time going up is

Correct AnswerverifiedShow Answer

The force required to maintain an object at a constant velocity in free space is equal to

Correct AnswerverifiedShow Answer

A car by itself is capable of a certain maximum acceleration.When it tows a twice-as-massive car,its maximum acceleration is

Correct AnswerverifiedShow Answer

The emphasis of the orange-and-apple sequence in your text is

Correct AnswerverifiedShow Answer

When a boulder and a pebble are dropped,why does the pebble pick up speed as quickly as the boulder,even though less gravity acts on it? In other words,why do both accelerate equally?

Correct AnswerverifiedAcceleration depends not only on the for...View AnswerShow Answer

A 10-kg 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 is

Correct AnswerverifiedShow Answer

After a ball tossed upward leaves your hand,the force of gravity on it

Correct AnswerverifiedShow Answer

A tow truck exerts a force of 3000 N on a car that accelerates at 2 m/s2.What is the mass of the car?

Correct AnswerverifiedShow Answer

A 10-kg brick and a 1-kg book are dropped in a vacuum.The acceleration of the 10-kg brick is

Correct AnswerverifiedShow Answer

Whirl a rock at the end of a string and it follows a circular path.If the string breaks,the rock tends at first to

Correct AnswerverifiedShow Answer

A push on a 1-kg brick accelerates the brick.Neglecting friction,to equally accelerate a 10-kg brick requires the force to be

Correct AnswerverifiedShow Answer

Lillian pulls on a 10-kg wagon with a constant force of 30 N.What is the wagon's acceleration?

Correct AnswerverifiedShow Answer

The net force on any object moving at constant velocity is

Correct AnswerverifiedShow Answer

A commercial jet has a mass of 5000 kg.During takeoff the thrust of its engine is 10,000 N,producing an acceleration of

Correct AnswerverifiedShow Answer

A heavy rock and a light rock in free fall have the same acceleration because the

Correct AnswerverifiedShow Answer

Why will girls wearing gym shoes win in a tug-of-war against boys wearing socks while the activity occurs on a smooth floor?

Correct AnswerverifiedIn any tug of war,the tension on both en...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

A physicist says that a car accelerating along a level road is being propelled by the road.Defend this statement.

Correct AnswerverifiedIt's true.The tires are made to rotate b...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

A 10-kg brick and a 1-kg book are dropped in a vacuum.The force of gravity on the 10-kg brick is

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
verified
Acceleration depends not only on the for...
View Answer

Correct Answer
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Correct Answer
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A tow truck exerts a force of 3000 N on a car that accelerates at 2 m/s².What is the mass of the car?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified
In any tug of war,the tension on both en...
View Answer

What applied horizontal force will accelerate a 400-kg crate at 1 m/s²across a factory floor against a friction force half its weight?

Correct Answer
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Correct Answer
verified
It's true.The tires are made to rotate b...
View Answer

Correct Answer
verified

Correct Answer
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