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Unit 1 Practice GHS

Total questions: 120

Worksheet time: 5hrs 38mins

Name
Class
Date
1.
This force holds us to earth’s surface.
a)
friction
b)
mass
c)
gravity
d)
tension
2.
___________ is the amount of matter in an object.
a)
mass
b)
weight
c)
volume
d)
force
3.
Gravity affects which of the following?
a)
Mass
b)
Weight
c)
Density
d)
Mass and Weight
4.
Which of the following forces is a force that acts on an object by touching the object?
a)
electricity
b)
friction
c)
gravity
d)
magnetism
5.

What is the definition of a force?

a)

Net force equal 0N and there is no change in the object's motion

b)

the overall force acting on an object after all forces are combined

c)

a push or a pull that acts on an object

d)

The force does not equal 0N, the object accelerates

6.

What is the definition of net force?

a)

a push or a pull that acts on an object

b)

Net force equal 0N and there is no change in the object's motion

c)

the sum of all forces acting on an object

d)

The force does not equal 0N, the object accelerates

7.

What do we call a force that has a net force of zero Newtons and the object does not change its motion?

a)

balanced force

b)

unbalanced force

c)

acceleration force

d)

net force

8.

What do we call a force that causes an object to accelerate?

a)

net force

b)

moving force

c)

acceleration force

d)

unbalanced force

9.

What is the magnitude and direction of the force in the free body diagram shown?

a)

70 N right

b)

70 N left

c)

50 N right

d)

50 N left

10.

What is the magnitude and direction of the force in the free body diagram shown?

a)

20 N, no change in motion

b)

20 N right

c)

20 N left

d)

0 N , no change in motion

11.

What is the magnitude and direction of the force in the free body diagram shown?

a)

2000 N forward

b)

800 N backward

c)

1200 N forward

d)

2800 N forward

12.

What is the magnitude and direction of the force in the free body diagram shown?

a)

35 N right

b)

17 N right

c)

11 N right

d)

5 N right

13.

What is the magnitude and direction of the force in the free body diagram shown?

a)

5 N down

b)

0 N, no change in movement

c)

15 N up

d)

15 N down

14.

What is the magnitude and direction of the force in the free body diagram shown?

a)

2 N right

b)

2 N left

c)

4 N right

d)

2 N up and 2 N right

15.

In the free-body diagram, which of the following is the gravitational force acting on the balloon?

a)

5120 N

b)

950 N

c)

1520 N

d)

4050 N

16.
Who wins the tug of war with what net force?
a)
The person on the left with 20 N
b)
The person on the left with 80 N
c)
The people on the right with 20 N
d)
The people on the right with 100 N
17.
Which of the following best explains the behavior of the objects shown in the picture?
a)
inertia
b)
weight
c)
normal force
d)
air resistance
18.

The biker travels at constant velocity. All of the following are true except-

a)

he has a net force acting on him.

b)

the normal force is equal to his weight.

c)

the force of friction acts opposite the direction of his motion.

d)

the force of friction is equal to the forward force he applies.

19.
If an object is traveling at constant velocity, which two forces will be equal?
a)
weight and net
b)
applied and frictional
c)
net and frictional
d)
net and applied
20.
If an object is resting on a flat, horizontal surface, which of the following will be equal?
a)
weight, mass, gravitational force
b)
normal force, weight, gravitational     force
c)
mass, normal force, frictional force
d)
net force, gravitational force,   frictional force
21.
For objects moving vertically at constant velocity,
a)
the net force is equal to the      frictional force.
b)
the net force is greater than the    applied force.
c)
the gravitational force is equal to    the frictional force.
d)
the applied force is equal to the      weight of the object.
22.

The sum of all forces acting on an object and direction is called the

a)

Balanced Force

b)

Net Force

c)

Unbalanced Force

d)

Contact Force

23.

Forces have both ________ and direction.

a)

Magnitude

b)

Speed

c)

Gravity

d)

Height

24.

Name the missing force.

a)

Gravitational Force

b)

Normal Force

c)

Friction Force

d)

Applied Force

25.

Name the missing force.

a)

Normal Force

b)

Push/Pull Force

c)

Friction Force

d)

Tension Force

26.

Name the missing force.

a)

Normal Force

b)

Friction Force

c)

Gravitational Force

d)

Push/Pull Force

27.

Name the missing force.

a)

Gravitational Force

b)

Normal Force

c)

Tension Force

d)

Friction Force

28.

The force that keeps objects on top of surfaces instead of letting them sink into the surface is known as:

a)

Normal Force

b)

Gravitational Force

c)

Friction Force

d)

Air resistance

29.

This diagram can be used to indicate which of the following? (TWO correct answers)

a)

An object at rest

b)

An object accelerating

c)

An object decelerating

d)

an object moving at a constant velocity (speed)

e)

(Trick question -- there is only one correct answer)

30.

Which of the following is true about this free-body diagram?

a)

the forces are balanced

b)

the object is moving upward

c)

the object is free-falling

d)

the forces are unbalanced

31.

Newton's First Law: An object in motion will stay in motion and an object at rest will stay at (a)   unless acted on by an outside force.

32.

A leftward force is applied to a crate to push it across the floor at a constant speed. Which is the correct force diagram?

a)
b)
c)
d)
33.

A rightward force is applied to a dresser to accelerate it to the right across the bedroom floor.

a)
b)
c)
d)
34.

A 12 kg ball is accelerated at a rate of 2.0 m/s2. Calculate the force.

F = m x a

a)

.16 N

b)

6 N

c)

24 N

d)

24kg

35.
A wheeled cart is moving to the right at a constant speed.  Two forces of equal magnitude are acting upon the cart. Which of the following best describes the forces and motion of the cart?
a)
Balanced Forces, Constant Speed
b)
Balanced Forces, Acceleration
c)
Unbalanced Forces, Constant Speed
d)
Unbalanced Forces, Acceleration
36.
A crumpled piece of paper hits the ground before a flat sheet of paper because
a)
the acceleration of gravity is greater on the  crumpled paper.
b)
there is more air resistance against the flat paper.
c)
the crumpled paper is more massive
d)
the crumpled paper is less massive.
37.
Acceleration is caused by a force acting on a mass.
a)
Newton’s first law of motion
b)
Newton’s second law of motion
c)
Newton’s third law of motion
38.

If a force of 26 N is exerted on two balls, one with a mass of 0.52 kg and the other with a mass of 0.78 kg, which ball will have the greater acceleration? (F=ma)

a)

The one with a mass of .78 kg will have the greatest acceleration.

b)

The one with a mass of .52 kg will have the greatest acceleration.

c)

They will both accelerate at the same rate.

39.

A 20 kg bike accelerates at 10 m/s2. what was the force?

F = m x a

a)

25 Newtons

b)

20 Newtons

c)

200 Newtons

d)

10 Newtons

40.
A student pushes a box to right with a force of 10N while a young boy pushes the box to the left with a force of 8N. What is the sum of all forces on the box? 
a)
18N left
b)
18N right
c)
2N right
d)
2N left
41.
If net force acting on object is 0, then the force is considered to be..
a)
Balanced
b)
Unbalanced
c)
Equal in Direction
d)
Distance/Time
42.
Which type of force(s) will cause a change in an object's motion?
a)
gravity
b)
zero net force
c)
balanced forces
d)
unbalanced forces
43.
45 m/s2 is the... 
a)
Mass
b)
Force 
c)
Acceleration
d)
weight
44.
Unit of mass
a)
m/s 2
b)
m/s
c)
newtons
d)
kg
45.
The masses of four objects are given in this table. If all objects are struck with the same amount of force, which one will have the greatest acceleration?
a)
Object 1
b)
Object 2
c)
Object 3
d)
Object 4
46.
A force of 90N is applied to each cart below, which one will accelerate the fastest?
a)
Cart 1
b)
Cart 2
c)
Cart 3 
d)
Cart 4
47.

A quantity with both a magnitude and direction

a)

Vector

b)

Speed

c)

Newton

d)

Newton's Second Law

48.

The amount of matter in an object

a)

Mass

b)

Force

c)

Velocity

d)

Acceleration

49.

How quickly an object moves along a path

a)

Speed

b)

Acceleration

c)

Force

d)

Mass

50.

The law which states that force equals mass

times acceleration. F = ma

a)

Newton's Law of Gravitation

b)

Newton's 1st Law of Motion

c)

Newton's 2nd Law of Motion

d)

Newton's 3rd Law of Motion

51.

The constant acceleration on an object because

of gravitational force.

a)

Balanced Force

b)

Velocity

c)

Speed

d)

Acceleration due to gravity

52.

A force that resists the relative motion of two

objects or substances sliding against one another

a)

Frictional Force

b)

Gravitational Force

c)

Balanced Force

d)

Net Force

53.

A situation where the net force on a system is not

zero

a)

Balanced Force

b)

Unbalanced Force

54.
Name the missing force...
a)
spring force
b)
weight force
c)
normal force
d)
buoyant force
55.
Name the missing force...
a)
tension force
b)
frictional force
c)
normal force
d)
spring force
56.

Whenever an object is moving, there is always this force opposing the motion:

a)

inertia

b)

momentum

c)

friction

d)

applied force

57.

The force that keeps objects on top of surfaces instead of letting them sink into the surface is known as:

a)

normal

b)

abnormal

c)

static

d)

inertia

58.

The force exerted by ropes and chains is called

a)

tension

b)

normal

c)

elastic

d)

mechanical

59.

What is the NET FORCE of this diagram?

a)

17 N, right

b)

17 N, left

c)

23 N, right

d)

12 N, up

60.

What is the appropriate way to indicate Gravity in a diagram?

a)
b)
c)
d)
61.

Determine the net force and direction:

a)

11 N Left

b)

11 N Right

c)

0 N Left

d)

5 N Left

62.

Determine the force at G:

a)

30 N

b)

20 N

c)

50 N

d)

0 N

63.
What are the 2 types of friction discussed in the book?
a)
Static and Dynamic Friction
b)
Kinetic and Static Friction
c)
Kinetic and Dynamic Friction
d)
Dynamic and Moving Friction
64.
Which of the following is opposed by kinetic friction?
a)
A truck being pushed but not moving
b)
A box being pushed but not moving
c)
A box being pushed and sliding across the floor
d)
A wagon being pulled but not moving
65.

FN=100N, Ff=20N

a)

μ=5.0

b)

μ=0.2

c)

μ=1.2

d)

μ=0.1

66.
Rougher surfaces have ...
a)
greater friction
b)
less friction
c)
the same level of friction
67.
What is the coefficient of static friction if it takes 44 N of force to move a box that weighs 86 N? 
a)
0.78
b)
0.51
c)
0.78 N
d)
0.58 N
68.
 What is the force of friction between a block of ice that weighs 950 N and the ground if μ = .12? 
a)
65 N
b)
226 N
c)
175 N
d)
114 N
69.
the force due to friction on a bike tire is 70 N. If the coefficient of friction of the road is 0.78, what is the mass of the bike?
a)
89.7
b)
8.97 N
c)
8.97 kg
d)
54.6 kg
70.
A hockey puck slides on ice at a constant velocity. What is the net force acting on the puck?
a)
Zero
b)
Equal to its weight
c)
Less than its weight but greater than zero
d)
Depends on the speed of the puck
71.

A box with a mass of 275 kg is pulled along a level floor with constant velocity. If the coefficient of friction between the box and floor is 0.64, what horizontal force is required to start moving the box?

a)

176 N

b)

429.68 N

c)

970.2 N

d)

1724.8 N

72.

A horizontal force of 350.0 N is required to continue pulling a 2060 N trunk across the floor at constant speed. Find the frictional coefficient of kinetic friction?

a)

0.17

b)

0.6

c)

5.89

d)

57.68

73.

If 7000 N of force is exerted on a 1300 Kg car. What is the acceleration caused by the net force if the kinetic friction force is 2400 N?

a)

3.54 m/s2

b)

3.54 m/s

c)

7.08 m/s2

d)

7.08 m/s

74.

A horizontal force of 15.0 N is required to continue pulling a 26 N baby shark plushie across the floor at constant speed. Find the frictional coefficient of kinetic friction?

a)

0.147

b)

1.73

c)

0.576

d)

390

75.

A block of ice with a mass of 605 kg is pulled along a level floor with constant velocity. If the coefficient of static friction between the ice and floor is 0.18, what horizontal force is required to start moving the box?

a)

108.9 N

b)

5929 N

c)

1067.22 N

d)

32938.8 N

76.

How much force must be applied to push a 2.00 kg book across the deck at constant speed if the coefficient of sliding friction is 0.40?

a)

0.8 N

b)

3.92 N

c)

7.84 N

d)

19.6 N

77.

A 200 kg commuter is standing on a train accelerating at 5.00 m/s2.

What coefficient of friction must exist between the commuter's feet and the floor to avoid movement? (Hint: Make the frictional force equal the Net force by the train)

a)

0.025

b)

0.51

c)

1000

d)

1960

78.

A 2500.0 N force is exerted on a 400.0 kg crate to move it across the floor. If the coefficient of kinetic friction is 0.180, what is the crate's acceleration?

a)

3920 m/s2

b)

705.6 m/s2

c)

1794.4 m/s2

d)

4.486 m/s2

79.

A 700.0 N force is exerted on a 35.0 kg cart that is already moving. If the coefficient of kinetic friction is 0.390, what is the cart's new acceleration?

a)

2.04 m/s2

b)

357 m/s2

c)

566.23 m/s2

d)

16.178 m/s2

80.

A 60.0 N force is exerted on a 5.0 kg ball that is already moving. If the ball's new acceleration is 8 m/s^2, what is the coefficient of kinetic friction?

a)

0.49

b)

0.41

c)

1.5

d)

0.62

81.
What is the definition of "weight"?
a)
the force in which gravity pulls on an object
b)
the time it takes to get on a ride 
c)
the amount of matter in an object
d)
the size of an object
82.
A 450 N object has a mass of _____ on earth
a)
4500 kg
b)
45 kg 
c)
4.5 kg 
d)
450 kg
83.
A spring with a spring constant (k) of 5 N/m is stretch 0.2 m. The spring force is 
a)
1 N
b)
25 N
c)
5.2 N
d)
4.8 N
84.
How far is a spring with k = 9 N/m stretched when a 5 kg mass is attached? 
a)
0.55 m
b)
5.5 m
c)
1.8 m 
d)
18 m 
85.
What type of friction is not moving?
a)
static
b)
sliding
c)
fluid
d)
rolling
86.
A type of friction that occurs when air pushes against a moving object causing it to negatively accelerate
a)
surface area
b)
air resistance
c)
descent velocity
d)
gravity 
87.
Friction is a force that acts in an ___________ direction of movement.
a)
similar
b)
opposite
c)
parallel
d)
west
88.
A spring has a spring constant of 330 N/m.  How far is the spring compressed if 150 N of force are used?
a)
2.2 m
b)
0.0014 m
c)
5.0 m
d)
0.45 m
89.
A force of F=500 N is applied to extend a spring.  What is the displacement x of the spring if its spring constant is k= 540 N/m?
a)
0.96 m
b)
0.93 M
c)
1.3 m
d)
1.1 m
90.
If F is force, k is spring constant and x is extension, Hooke's Law tells us that:
a)
F=k/x
b)
x=Fk
c)
k=Fx
d)
F=kx
91.
What force should be applied to compress a spring by 0.013 m if its spring constant is k = 1900 N/m?
a)
1880 N
b)
24.7 N
c)
1900 N
d)
0.127 N
92.
A force of 470 N is applied to stretch a spring which has a spring constant, k=1100 N/m.  How much does the spring stretch past its free length?
a)
0.214 m
b)
2.34 m
c)
0.427 m
d)
5.17 X 10^5 m
93.

A net force of 1400 N acts to stretch an extension spring. How far will the spring stretch if its spring constant is 700 N/m?

a)

1.0

b)

0.5m

c)

1.5 m

d)

2.0 m

94.
What force should be applied to compress a spring by 0.013 m if its spring constant is k = 1900 N/m?
a)
1880 N
b)
24.7 N
c)
1900 N
d)
0.127 N
95.
What force should be applied to compress a spring by 0.013 m if its spring constant is k = 1900 N/m?
a)
1880 N
b)
24.7 N
c)
1900 N
d)
0.127 N
96.
A spring has a spring constant of 330 N/m.  How far is the spring compressed if 150 N of force are used?
a)
2.2 m
b)
0.0014 m
c)
5.0 m
d)
0.45 m
97.
A spring extends 1.5m under load 10N. What is its spring constant?
a)
0.15N/m
b)
10N/m
c)
6.7N/m
d)
15N/m
98.
If an object's mass =30 Kg on the Earth, what would be it's weight on Earth?
a)
3 kg
b)
300 kg
c)
3 N
d)
300 N
99.
An object weighs 340 N.  What is its mass?
a)
340 kg
b)
340 N
c)
34 kg
d)
34 N
100.
What is Newton's First Law known as? The Law of
a)
Friction
b)
Mass
c)
Inertia
d)
Gravity
101.
Which type of force(s) will cause a change in an object's motion?
a)
gravity
b)
zero net force
c)
balanced forces
d)
unbalanced forces
102.
What is Newton's First Law
a)
F=ma
b)
Every action has an equal and opposite reaction
c)
An object at rest stays at rest, an object in motion stays in motion. 
d)
Friction 
103.
Which one needs a greater net force to move, a kilogram of feathers or a kilogram of iron? 
a)
feathers 
b)
iron
c)
same
d)
depends on their friction
104.

Newtons law states that for every action, there is an_________ reaction

a)

unequal and opposite

b)

stronger and opposite

c)

equal and similar

d)

equal and opposite

105.

Force always come in________

a)

waves

b)

triplets

c)

pairs

106.

When a heavy football player and a light one run into each other, who exerts more force? (pushes harder)

a)

The light one

b)

They exert the same force on each other

c)

The heavy one

107.

When a small car pushes a big truck, the truck applies an equal and opposite force on the car.

a)

False

b)

True

108.

You can't exert a force on anything unless it also exert a force on you

a)

False

b)

True

109.

When a cannon fires a cannonball we observe Newton's third law. Which results from the reaction force?

a)

The cannon moving forward

b)

The cannon moving backwards

c)

The cannonball moving backwards

d)

The cannonball moving forward

110.

When you step on a small pebble, the pebble applies an equal and opposite force on your foot.

a)

True

b)

False

111.

Action-reaction pairs can cause a change in motion.

a)

True

b)

False

112.

When the person pushes the ground with their foot, the equal and opposite reaction force is

a)

the ground pushing back on their foot

b)

when they start to move forward

113.
A person steps out of the boat and onto the dock.  As the person moves forward onto the dock, the boat moves backward.  Which statement best describes the backward motion of the boat as the person steps forward?
a)
For every action there is an equal and opposite reaction.
b)
Every mass exerts a force on every other mass.
c)
An object at rest tends to stay at rest.
d)
Friction opposes the motion of an object.
114.

What happens to the balloon if the air is released ?

a)

Balloon goes right

b)

Balloon goes up

c)

Balloon goes down

d)

Balloon goes left

115.

The two paired forces in Newton's third law:

a)

act on different objects

b)

are equal in size

c)

are opposite in direction

d)

are the same type

e)

all of the above

116.

A baby elephant is being lifted up by a bunch of balloons. What is the reaction force?

a)

The elephant falls down

b)

The elephant pulls down on the balloons

c)

The balloons exert a normal force on the elephant

117.

If the force is a bat hitting a baseball, what is the reaction force?

a)

The baseball hitting the bat.

b)

The baseball flying toward center field.

c)

The bat hitting the player’s hands.

118.

A fast-moving truck hits a bug that is hovering over the road. Which experiences more force?

a)

The truck

b)

Both experience the same force

c)

the bug

119.

who is pulling harder?

a)

the man

b)

the elephant

c)

they both pull with the same force

120.

two ice skaters push away from each other. The man weighs more than the woman. Which is true

a)

the woman pushes the man harder than he pushes her

b)

they both push with the same force

c)

the man pushes the woman harder than she pushes him

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