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Forces and Newton's Laws

Total questions: 138

Worksheet time: 2hrs 47mins

Name
Class
Date
1.
What is the net force?
a)
40 N left
b)
0 N Balalnced
c)
400 N right
d)
40 N right
2.
How will this object move? 
a)
It won't move. 
b)
It will move to the right. 
c)
It will move to the left. 
d)
It will move in both directions. 
3.
How will this object move? 
a)
It won't move. 
b)
It will move to the right. 
c)
It will move to the left. 
d)
It will move up. 
4.
What is the net force?
a)
30 N left
b)
25 N right
c)
5 N left
d)
55 N right
5.
Which could be an example of an unbalanced force?
a)
A plate sitting on a dining table
b)
A ball at the top of a hill that is not moving
c)
Earth orbiting the Sun 
d)
A baseball that has been thrown to home plate.
6.
You and your dad are moving the couch from one side to another. Your dad pushes with a force of 35 N to the right and you push with a force of 25 N right. What is the net force on the couch?
a)
60 N right
b)
10 N left
c)
60 n right
d)
50 N left
7.
What is the net force?
a)
400 N Up
b)
400 N Down
c)
- 400 N Down
d)
800 N Down
8.
Forces that have a net force of zero ( the object is still).
a)
Balanced force
b)
Unbalanced force
9.
The sum of all forces acting on an object and direction
a)
Contact Force
b)
Balanced Force
c)
Unbalanced Force
d)
Net Force
10.
8 N to the left , and 4 N to the right. Find the net force. Is this balanced 
a)
12 N Right  No
b)
4 N Left  No
c)
12 N Right  Yes
d)
4 N Left  Yes
11.
Balanced or Unbalanced?
a)
Balanced 
b)
Unbalanced
12.
Are forces balanced or unbalanced when a car is moving at a constant speed in a straight line?
a)
Balanced
b)
Unbalanced
13.
Are forces balanced or unbalanced when a marble rolls down a ramp?
a)
Balanced
b)
Unbalanced
14.
Are forces balanced or unbalanced when skateboarding down a ramp?
a)
Balanced
b)
Unbalanced
15.
What are balanced forces?
a)
Forces in the same direction
b)
Forces of the same size
c)
forces of the same size in opposite directions
16.
How could you make an object increase its speed?
a)
use less force
b)
use more force
c)
use no force
17.
for every action there is...
a)
An equal and opposite reaction
b)
An equal and different reaction
c)
a different force
d)
two more forces
18.
In a tug of war the left team pulls with a force of 200N. The right team pulls with a force of 150N.What is the resultant force?
a)
50N to the left.
b)
350N to the left.
c)
350N to the right.
d)
50N to the right.
19.
The force that opposes the motion of two surfaces sliding past each other is called ___________.
a)
acceleration
b)
inertia
c)
friction
d)
unbalanced
20.
What is the unit of force?
a)
Kilogram
b)
Meter
c)
Pascal
d)
Newton
21.
What is it called when the force of gravity is acting on an object?
a)
Weight
b)
Sliding Friction
c)
Momentum
d)
Projectile Motion
22.
What is the attraction between two objects because of their mass?
a)
Inertia
b)
Gravity
c)
Gravitational Force
d)
Weight
23.
Imagine you travel to another planets. What will change as you walk around the surface of the planet- your mass or your weight?
a)
Mass
b)
Weight 
c)
Both 
d)
Neither 
24.
This is a rocket.The rocket pushes the fuel down.What is the other force in this interaction pair?
a)
The fuel pulls the rocket up.
b)
The fuel pushes the rocket up.
c)
The rocket pulls the earth up.
d)
The earth pulls the rocket down.
25.
On the Picture the balloon pushes the air right and the balloon goes left. Which of Newton's Laws is this?
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
26.
What is the product of an objects mass and velocity?
a)
Momentum
b)
Gravity
c)
Inertia
d)
Weight
27.
How much does a 6.0 kg bag of bolts weigh? (w = m*g) (g = 9.81 m/s2)
a)
6.0N
b)
12.0N
c)
58.8N
d)
600N
28.
Suppose two carts, one twice as massive as the other, fly apart when the compressed spring that joins them is released.  How fast does the heavier cart roll compared with the lighter cart?
a)
twice as fast
b)
the same
c)
half as fast
29.
A book rests on a table.  The force of gravity pulls down on the book with a force of 20 newtons. What prevents the books from accelerating downward at 9.8 m/sec2    
a)
The table presses back up on the book with an equal and opposite force of 20 newtons.
b)
The table presses back up on the book with a force greater than 20 newtons.
c)
The table and the book together are accelerating downwards at  9.8 m/sec2
d)
The inertia of the book holds it up
30.
In a normal environment, why does a bowling ball and feather hit the ground at different times when dropped from the same height?
a)
They don't; they hit the ground at the same time.
b)
One is more dense than the other.
c)
One is heavier than the other.
d)
Air resistance 
31.
You push on a tree with 20 N of force. If the tree doesn't move, the tree is pushing back on you with _____of force.
a)
20N 
b)
40N 
c)
10N 
d)
70N
32.
Inertia is the tendency of an object to resist a change in its ___________. 
a)
temperature
b)
shape
c)
size
d)
motion
33.
Which is Newtons second law
a)
Force is equal to an objects mass times its velocity 
b)
an object in motion stays in motion or an object at rest stays at rest unless acted on by an outside force.
c)
law of inertia
d)
For every action there is an equal and opposite reaction
34.
If you dropped a bowling ball and a golf ball from the top of a building, which one would hit the ground first?
a)
bowling ball
b)
baseball
c)
neither
d)
both
35.
If a space explorer has a mass of 67kg but their weight is 944.7N? What planet is the explorer on?
(w = m*g)
Saturn: g=11.1 N/kg
Pluto: g=0.42 N/kg
Earth: g=9.8 N/kg
Neptune: g=14.1 N/kg
a)
Saturn
b)
Pluto
c)
Earth
d)
Neptune
36.
F=MA 
Going down a hill a 12 kg sled has a force of 36 N. What is it's acceleration? 
a)
2 m/s2
b)
3 m/s2
c)
I don't know
d)
What?
37.
If you slide a hockey puck on ice, eventually it will stop because of the friction of the ice. This is an example of which Law of Motion. 
a)
Newton's First Law 
b)
Newton's Second Law 
c)
Newton's Third Law 
38.
A person not wearing a seat belt flies through a car window when someone slams on the breaks because the person’s body wants to remain in continuous motion even when the car stops.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
None of them
39.
Wheels on a skateboard most likely experiences-
a)
Rolling Friction
b)
Sliding Friction
c)
Fluid Friction
d)
Static Friction
40.
Sally experiences-
a)
Rolling Friction
b)
Sliding Friction
c)
Fluid Friction
d)
Static Friction
41.
Wheels of a shopping cart experience-
a)
Rolling Friction
b)
Sliding Friction
c)
Fluid Friction
d)
Static Friction
42.
Friction is a force that acts in an ___________ direction of movement.
a)
similar
b)
opposite
c)
parallel
d)
west
43.
Objects balanced on Timmy's head experiences-
a)
Rolling Friction
b)
Sliding Friction
c)
Fluid Friction
d)
Static Friction
44.
Which type of friction occurs when solid surfaces slide over each other?
a)
rolling
b)
static
c)
sliding
d)
fluid
45.
Which type of friction occurs when an object rolls over or rotates on a surface?
a)
sliding
b)
static
c)
fluid
d)
rolling
46.
Which type of friction occurs when objects are not moving?
a)
static
b)
sliding
c)
fluid
d)
rolling
47.
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 
48.
How does friction affect speed?
a)
more friction decreases speed
b)
more friction increases speed
c)
less friction decreases speed
49.
Which of the following is an example of friction that is helpful?
a)
Brakes used on a bike
b)
Tires from a car on the road
c)
Tread on the bottom of your shoes
d)
All are examples that are helpful
50.
How can friction be reduced?
a)
reduce the force acting between the 2 surfaces
b)
reduce the roughness of the 2 surfaces coming in contact
c)
use wax, grease or oil
d)
all of the above are ways of reducing friction
51.
The amount of friction depends on the weight of the objects pressing together.
a)
True
b)
False
52.
The rougher the surface, the faster an object will travel over the surface.
a)
True
b)
False
53.
When most objects with smooth surfaces rub, there is less friction.
a)
True
b)
False
54.
What are 2 factors that determine the amount of friction between 2 objects?
a)
Force and roughness between surfaces
b)
hills and valleys and how smooth or rough the surface is
c)
Amount of force and amount of surface the comes in contact
d)
The force and the weight exerted on the surfaces
55.
Which of the following is an example of friction that is harmful?
a)
Pencil marking on paper
b)
Engine parts wearing out
c)
sand placed on ice in the winter
d)
Using an eraser to erase marks
56.
Which would NOT be a way of reducing friction?
a)
making the surfaces smoother
b)
using lubricants such as waxes, oils, or grease
c)
changing from sliding friction to rolling friction using ball bearings
d)
Using kitty litter on snow and ice to help your car gain traction
57.
What does friction produce?
a)
light
b)
sound
c)
heat
d)
gravity
58.
"For every action, there is an equal and opposite reaction."
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
Newton's 4th Law
59.
Force = Mass x Acceleration
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
Newton's 4th Law
60.
"An object in motion (or at rest) will to stay in motion (or at rest) until an outside force acts upon it."
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
Newton's 4th Law
61.
The tendency of a moving object to resist changes in its motion is...
a)
momentum
b)
force
c)
acceleration
d)
velocity
62.
Any push or pull on an object.
a)
force
b)
velocity 
c)
inertia
d)
momentum
63.
The force that opposes motion between two surfaces in contact with each other.
a)
inertia
b)
friction
c)
momentum
d)
gravity
64.
The force of attraction between all matter.
a)
inertia
b)
friction
c)
net force
d)
gravity
65.
A force that opposes motion between a surface in contact with the atmosphere.
a)
air resistance
b)
gravity
c)
momentum
d)
terminal velocity
66.
Which of the following is the same as a Newton?
a)
kg*m/sec/sec
b)
kg*m/sec
c)
m/sec/sec
d)
m/sec
67.
Which of the following is the units for momentum?
a)
kg*m/sec/sec
b)
kg*m/sec
c)
m/sec/sec
d)
m/sec
68.
Which of the following is the units for acceleration?
a)
kg*m/sec/sec
b)
kg*m/sec
c)
m/sec/sec
d)
m/sec
69.
Which of the following is the units for velocity?
a)
kg*m/sec/sec
b)
kg*m/sec
c)
m/sec/sec
d)
m/sec
70.
An archer pulls the bowstring back, then releases the string and the arrow flies forward. Pulling the string back is the...
a)
action force
b)
reaction force
c)
net force
d)
inertia
71.
An archer pulls the bowstring back, then releases the string and the arrow flies forward. The arrow flying forward is the...
a)
action force
b)
reaction force
c)
net force
d)
inertia
72.
A cannonball with a mass of 0.5 kg is flying at an acceleration of 10 m/sec/sec. What is it's force?
a)
50 Newtons
b)
5 Newtons
c)
20 Newtons
d)
9.5 Newtons
73.
A cannonball with a mass of 10 kg is flying at an acceleration of 5 m/sec/sec. What is it's force?
a)
50 Newtons
b)
5 Newtons
c)
20 Newtons
d)
9.5 Newtons
74.
Gravity is increased with...
a)
greater mass & shorter distance
b)
greater mass & farther distance
c)
lower mass & shorter distance
d)
lower mass & farther distance
75.
Mass x velocity= ?
a)
force
b)
inertia
c)
momentum
d)
velocity
76.
Mass x acceleration = ?
a)
force
b)
inertia
c)
momentum
d)
velocity
77.
A 10 lb. bowling ball hits a stationary 20 lb. bowling ball. Which of the following is not true about the 2nd ball?
a)
will have unbalanced forces acting on it
b)
move twice as fast as the original ball
c)
not move unless there is enough force to overcome its inertia
d)
take on the momentum of the original ball
78.

Which of the following forces is a contact force?

a)

Gravity

b)

Friction

c)

Magnetism

d)

Electricity

79.

The metric unit of force preferred by scientists is the:

a)

kilogram

b)

Newton

c)

Mima

d)

Pound

80.

Weight is a force that depends on mass and:

a)

friction

b)

gravity

c)

magnetism

d)

energy conservation

81.

Which of the following is the largest unit of force?

a)

Kilogram

b)

Ounce

c)

Pound

d)

Newton

82.

Two dogs are tugging on opposite ends of a rope toy. If each dog pulls with 50 N of force, what is the tension in the rope toy?

a)

0 N

b)

50 N

c)

100 N

d)

200 N

83.

If an elephant has a mass of 2,000 kg, what is her weight on Earth?

a)

0.0049 N

b)

204 N

c)

19,600 N

d)

43,100 N

84.

Compared to your weight and mass on Earth, if you were on the moon:

a)

your weight and mass would be less.

b)

your weight would be less but your mass would remain the same.

c)

your weight would remain the same, but your mass would be less.

d)

your weight would increase, but your mass would remain the same.

85.

A force that resists the motion of an object moving across a surface is called:

a)

static friction.

b)

sliding friction.

c)

rolling friction.

d)

air friction.

86.

Ball bearings decrease friction in rotating motion because:

a)

they are made of hard steel.

b)

they replace sliding friction with rolling friction.

c)

they separate surfaces with a cushion of air.

d)

they can be made in all sizes to fit different machines.

87.

Which of the following would increase the sliding friction between your foot and the floor?

a)

Increasing the weight on your foot.

b)

Decreasing the weight on your foot.

c)

Putting water between your foot and the floor.

d)

Separating your foot and the floor.

88.

The tires on a car have grooves in them. How do these grooves affect the friction between the tires and the

road during wet weather?

a)

They increase friction.

b)

They decrease friction.

c)

They have no effect on friction.

d)

They first decrease, then increase friction.

89.

Luka pushes a box across the floor in the direction shown by the arrow in the diagram below:


The direction of the friction force acting on the box is:

a)

up

b)

down

c)

left

d)

right

90.

Which types of energy are released by the friction force between a car’s tires and the road during a skidding,

squealing stop?

a)

Heat and sound

b)

Motion and friction

c)

Nuclear and gravity

d)

Lubrication and motion

91.

A student attempts to slide a block down a smooth, dry ramp as shown, but the block does not move. The

most likely explanation is that:

a)

the ramp is not steep enough for gravity to have any effect.

b)

there are no forces between the block and ramp.

c)

the sliding friction between the block and the ramp is lower than the force of gravity

pulling the box down the ramp.

d)

the static friction between the block and the ramp is greater than the force of gravity

pulling the box down the ramp.

92.

Which free-body diagram shows an object that will accelerate?

a)

Diagram A

b)

Diagram B

c)

Diagram C

d)

Diagram D

93.

The diagram below is a free-body diagram picturing a cyclist moving along a highway. 4 forces, represented

by arrows A, B, C, and D are acting on the cyclist as she pedals.


The arrow that would best represent the normal force is:

a)

A

b)

B

c)

C

d)

D

94.
What is a normal force?
a)
It always opposes gravity.
The same as a frictional force.
b)
It is equivalent to the weight of an object.
c)
It acts perpendicular to a contact surface.
d)
It is equivalent to inertia.
95.
When forces are _________ the object DOES NOT move.
a)
unbalanced
b)
balanced
c)
heavy
d)
light
96.
The net force on a 15 kg rock is 60 N. What is the acceleration?
a)
4 m/s
b)
4 m/s^2
c)
900 N
d)
0.25 m/s^2
97.
Calculate the net force.
a)
5 N
b)
10 N
c)
45 N
d)
500 N
98.
Units for Mass
a)
kg
b)
N
c)
m/s^2
d)
m/s
99.
What is the net force?
a)
17 N Right
b)
3 N Right
c)
3 N Left
d)
17 N Left
100.
What is force?
a)
A push exerted on an object
b)
A push or pull exerted on an object
c)
A pull exerted on an object
d)
Nothing
101.
How much does a 6.0 kg bag of bolts weigh? (w = m*g) (g = 9.81 m/s2)
a)
6.0N
b)
12.0N
c)
58.8N
d)
600N
102.
What force holds the planets in motion around the sun?
a)
Magnetic
b)
Electrical
c)
Gravitational
d)
Air Resistance
103.

Which statement is true about balanced and unbalanced forces?

a)

Neither balanced or unbalanced forces cause motion

b)

Balanced forces can either have no motion or have an object moving at a constant speed

c)

Unbalanced forces do not change motion and balanced forces change motion

104.

Which contact force slows down an object's motion due to the rubbing of surfaces?

a)

Normal force

b)

Frictional force

c)

Magnetic force

d)

Applied force

105.

Whenever a car is moving at a constant speed, which choice is true

a)

All forces acting on the car are balanced

b)

The car has positive acceleration

c)

The car has negative acceleration

d)

All forces acting on the car are UNbalanced, because the car is in motion

106.

There is one person pushing a box to the RIGHT with 20 Newtons of force and one person pushing to the LEFT with 15 Newtons of force. What is true about the forces acting on the box?

a)

The forces are NOT balanced and the box will move to the left

b)

The forces are NOT balanced and the box will move to the right

c)

The forces ARE balanced and the box will not move

d)

The forces ARE balanced and the box will move to the left

107.
Examples of forces that make something move are...
a)
pushes
b)
pulls
c)
both pushes and pulls
108.
Forces can change the ________ of a moving object.
a)
direction
b)
push
c)
pull
d)
friction
109.
___________ forces cancel each other out, because they are equal.
a)
unbalanced
b)
balanced
c)
large
d)
heavy
110.
When forces are ___________ the object will move.
a)
unbalanced
b)
balanced
c)
light
d)
gravity
111.
Forces that happen between objects that touch are called _____________.
a)
magnetism
b)
gravity
c)
slippery
d)
contact forces
112.
Two forces that act on an object without touching it are:
a)
gravity and friction
b)
gravity and magnetism
c)
friction and magnetism
d)
pushes and pulls
113.
The pulling force that we cannot see that exists between any two objects is __________. It keeps us on the ground.
a)
gravity
b)
magnetism
c)
friction
d)
rough
114.
The measure of the pull of gravity on an object is its ___________.
a)
force
b)
volume
c)
height
d)
weight
115.
There is very little friction between ____________ or slippery surfaces.
a)
smooth
b)
rough
c)
hard
d)
soft
116.
There is more friction between _________ surfaces.
a)
smooth
b)
slippery
c)
hard
d)
rough
117.
A push or pull exerted on an object
a)
Force
b)
Net force
c)
Momentum
d)
Speed
118.
Forces that produce a nonzero net force, which changes an objects motion.
a)
Force
b)
Momentum
c)
Unbalanced Force
d)
Speed
119.
Free-falling objects fall at a rate of...
a)
98 m/s
b)
9.8 mm/s
c)
9.8 m/s
d)
9..8 m/s
120.
What is a friction force  acting on an NON- moving object.
a)
Static friction 
b)
Fuild friction 
c)
Rolling friction 
d)
Sliding Friction 
121.
Two factors effecting the magnitude of the force of gravity between 2 objects are...
a)
Mass and Distance 
b)
Mass and Matter
c)
Distance and Weight 
d)
Weight and Mass
122.
What is a friction force acting upon an object on wheels?
a)
Static 
b)
Sliding 
c)
Rolling 
d)
Fluid 
123.
Is this and example of a balanced or unbalanced force?
a)
balanced
b)
KITTIES!
c)
unbalanced
d)
pshhh
124.
What is the net force?
a)
5000 N right
b)
4000 N right
c)
40 N left
d)
4000 N left
125.
Is it BALANCED? 
a)
Yes
b)
No
126.
What is the magnitude (size) and direction of the net force?
a)
21 N to the Left
b)
3 N to the Left
c)
21 N to the Right
d)
3 N to the Right
127.

Mass is measured in...?

a)

Kg

b)

N

c)

M

d)

*C

128.

What can help prevent friction?

a)

Lubricant

b)

Dirt

c)

Oil

d)

Sugar

129.
What is the net force?
a)
40 N left
b)
0 N Balalnced
c)
400 N right
d)
40 N right
130.
What is the net force
a)
10 N
b)
0 N
c)
25 N
d)
1 N
131.
On which surface would friction be the greatest?
a)
carpet
b)
ice
c)
snow
d)
satin
132.

A contact force requires __________ for an object to move?

a)

physical contact with the object

b)

no physical contact with the object

133.

What is the value of acceleration due to gravity?

a)

10m/s2

b)

9.8m/s2

c)

100m/s2

d)

980m/s2

134.

Select the matching situation.

a)

A rocket accelerating during lift-off.

b)

A monkey hanging from a rope.

c)

A car being towed.

d)

A book at rest on a table.

135.

Select the matching situation.

a)

A rocket accelerating during lift-off.

b)

A monkey hanging from a rope.

c)

A car being towed.

d)

A book at rest on a table.

136.

Select the matching situation.

a)

A rocket accelerating during lift-off.

b)

A monkey hanging from a rope.

c)

A car being towed.

d)

A book at rest on a table.

137.

How much does a monkey weigh on Earth? (m = 5 kg)

a)

w = - (5 kg)(9.8 m/s2)

b)

w = - (0.01)(5 kg)(9.8 m/s2)sin(30o)

c)

w = - (5 kg)

138.
Why is ice slippery?
a)
less friction
b)
because it is cold
c)
more friction
d)
gravity  is stronger on ice

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