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Momentum Study Guide for this section can be found here:  Newton's Laws HW Study Guide1


Newton's Laws Practice Exam Pt. 1

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

Galileo found that a ball rolling down one inclined plane would roll how far up another inclined plane?
a.
The ball would not roll up the other plane at all.
b.
To nearly its original height
c.
To about one quarter its original height
d.
To nearly twice its original height
e.
To nearly half its original height
 

 2. 

The law of inertia states that an object
a.
will continue moving at the same velocity unless an outside force acts on it.
b.
will continue moving in a straight line unless an outside force acts on it.
c.
that is not moving will never move unless a force acts on it.
d.
at rest will remain at rest unless acted on by an outside force.
e.
will do all of the above.
 

 3. 

The law of inertia applies to
a.
objects at rest.
b.
moving objects.
c.
both moving and nonmoving objects.
 

 4. 

After a cannonball is fired into frictionless space, the amount of force needed to keep it going equals
a.
zero, since no force is necessary to keep it moving.
b.
twice the force with which it was fired.
c.
one half the force with which it was fired.
d.
the same amount of force with which it was fired.
e.
one quarter the force with which it was fired.
 

 5. 

Compared to its weight on Earth, a 10-kg object on the moon will weigh
a.
the same amount.
b.
less.
c.
more.
 

 6. 

Compared to its mass on Earth, the mass of a 10-kg object on the moon is
a.
the same.
b.
more.
c.
less.
 

 7. 

The mass of a sheep that weighs 110 N is about
a.
1 kg.
b.
11 kg.
c.
110 kg.
d.
1100 kg.
e.
none of the above
 

 8. 

Friction
a.
comes from microscopic bumps that act as obstructions to the object's motion.
b.
is the name given to the force acting between surfaces sliding past one another.
c.
acts in a direction that opposes the motion of an object.
d.
all of the above
e.
none of the above
 

 9. 

A 15-N force and a 45-N force act on an object in opposite directions. What is the net force on the object?
a.
15 N
b.
30 N
c.
45 N
d.
60 N
e.
none of the above
 

 10. 

Equilibrium occurs when
a.
all the forces acting on an object are balanced.
b.
the sum of the +x forces on an object equals the sum of the –x forces.
c.
the net force on the object is zero.
d.
the sum of the upward forces equals the sum of the downward forces.
e.
all of the above
 

 11. 

A bag of sports equipment has a mass of 10.0 kilograms and a weight of
a.
0.98 N.
b.
9.8 N.
c.
98 N.
d.
980 N.
e.
none of the above
 

 12. 

A 5-N force and a 30-N force act in the same direction on an object. What is the net force on the object?
a.
5 N
b.
25 N
c.
30 N
d.
35 N
e.
none of the above
 

 13. 

An object weighs 30 N on Earth. A second object weighs 30 N on the moon. Which has the greater mass?
a.
The one on Earth
b.
The one on the moon
c.
They have the same mass.
d.
Not enough information to say
 

 14. 

How does acceleration of an object change in relation to its mass? It is
a.
directly proportional.
b.
Acceleration doesn't depend on mass at all.
c.
inversely proportional.
 

 15. 

The acceleration produced by a net force on an object is
a.
inversely proportional to the mass of the object.
b.
directly proportional to the magnitude of the net force.
c.
in the same direction as the net force.
d.
all of the above
e.
none of the above
 

 16. 

When an object reaches terminal velocity its acceleration is
a.
0 m/s2.
b.
4.9 m/s2.
c.
9.8 m/s2.
 

 17. 

A heavy person and a light person parachute together and wear the same size parachutes. Assuming they open their parachutes at the same time, which person reaches the ground first?
a.
the light person
b.
the heavy person
c.
Neither -- they both reach the ground together.
 

 18. 

Suppose the force of friction on a sliding object is 25 N. The force needed to maintain a constant velocity is
a.
more than 25 N.
b.
25 N
c.
less than 25 N.
 

 19. 

A book weighs 4 N. When held at rest in your hands, the net force on the book is
a.
0 N.
b.
0.4 N.
c.
4 N.
d.
39 N.
e.
none of the above
 

 20. 

A girl pulls on a 10-kg wagon with a constant force of 20 N. What is the wagon's acceleration?
a.
0.5 m/s2
b.
2 m/s2
c.
10 m/s2
d.
20 m/s2
e.
200 m/s2
 

True/False
Indicate whether the statement is true or false.
 

 21. 

A force can be simply defined as a push or a pull.
 

 22. 

The amount of matter in an object is its weight.
 

 23. 

The SI unit of mass is the newton.
 

 24. 

The force due to gravity acting on an object is its mass.
 

 25. 

The SI unit of force is the kilogram.
 

 26. 

An astronaut weighs the same on Earth as in space.
 

 27. 

An astronaut has the same mass on Earth as in space.
 

 28. 

If a hockey puck were to slide on a perfectly frictionless surface, it will eventually slow down because of its inertia.
 

Essay
 

 29. 

Write a short paragraph on the difference between mass and weight. Give examples.
 

 30. 

Suppose you are on an airplane moving at high speed. If you flip a coin straight up it will land in your lap rather than a great distance behind you. Explain.
 

Problem
 

 31. 

On the surface of Jupiter, the acceleration due to gravity is about 3 times that on Earth. How much would a 0.40-kg rock weigh on Jupiter?
 

 32. 

On the surface of Jupiter, the acceleration due to gravity is about 3 times that of Earth. What would be the mass of a 170-kg rock on Jupiter?
 

 33. 

You push with 10.0 N on a 5.0-kg block and there are no opposing forces. How fast will the block accelerate?
 



 
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