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Book 2: Unit 1 Lesson 3 Forces

Total questions: 48

Worksheet time: 2hrs 36mins

Name
Class
Date
1.

A force is ____.

a)

a push or pull that can cause movement

b)

a magnet

c)

when someone does not work

2.

A push is ____.

a)

a force to move something away

b)

a force to pull something towards you

c)

when a magnet attracts metals

3.

A pull is _____.

a)

a force to move something towards you

b)

a force to move something away

c)

when a magnet attracts metals

4.

Gravity is ____.

a)

a force that attracts objects towards each other

b)

a force that moves objects away

c)

a push or pull

5.

Magnetism is _____.

a)

a force that pulls metals towards a magnet

b)

when you look at a magnet

c)

a force that eats magnets

6.

This is an example of what force?

a)

pull

b)

push

c)

gravity

7.

This is an example of what force?

a)

push

b)

pull

c)

magnetism

8.

The dog pulled with a great amount of force therefore

a)

the acceleration is less

b)

the acceleration is more

c)

the mass increased

d)

the mass decreased

9.

using the same force on different objects with different masses, the object with less mass

a)

will accelerate quicker

b)

will accelerate slower

c)

will not move

d)

will accelerate at the same speed

10.
What force holds the planets in motion around the sun?
a)
Magnetic
b)
Electrical
c)
Gravitational
d)
Air Resistance
11.
An _______ force must act on an object for it to CHANGE it's motion
a)
balanced
b)
unbalanced
c)
gravitational
d)
electrical
12.

If the net force is equal to zero, the forces acting on the object are

a)

balanced

b)

unbalanced

13.
Balanced forces do not change the objects speed or 
a)
direction
b)
distance 
c)
time
d)
mass
14.
The unit of force is
a)
m/s
b)
m/s^2
c)
newton
d)
kg
15.
What is the net force?
a)
5000 N right
b)
4000 N right
c)
40 N left
d)
4000 N left
16.

Jonny and Patty are pushing against a basketball. Both of them push against the ball on opposite sides with a force of 20 N each to keep the ball still. What is the net force?

a)

400 N

b)

24 N

c)

0 N

d)

40 N

17.
What is the net force in this picture?
a)
50 Newtons to the right
b)
950 Newtons to the right
c)
950 Newtons to the left
d)
50 Newtons to the left
18.
Which one is balanced?
a)
top
b)
bottom
c)
both
19.
With unbalanced forces, the object will move in the direction of the _______ force.
a)
larger 
b)
smaller 
c)
equal 
d)
cannot be determined
20.
What is the net force?
a)
20 N 
b)
0 N 
c)
400 N 
d)
40 N 
21.
If these teams are pulling with the same amount of force what will happen?
a)
The boy in blue will win.
b)
They will not move at all.
c)
The boy in red will win.
d)
Both will fall down.
22.
The sum of all forces acting on an object.
a)
Contact Force
b)
Balanced Force
c)
Unbalanced Force
d)
Net Force
23.
Balanced or Unbalanced?
a)
Balanced 
b)
Unbalanced
24.
Calculate the Net Force. 
a)
60N, Left 
b)
40N, Right 
c)
0N
d)
60N, Right
25.
Calculate the Net Force. 
a)
40N, Left
b)
40N, Right
c)
0N, Balanced
d)
75N, Right
26.
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
27.
What is the net force?
a)
400 N Up
b)
400 N Down
c)
- 400 N Down
d)
800 N Down
28.

Which example would be a balanced force?

a)

Train moving at a constant speed in the same direction.

b)

A skier going down a hill.

c)

A basketball being passed to a teammate.

d)

An apple falling to the floor.

29.
On which surface would a toy car travel the furthest when pushed?
a)
ice
b)
carpet
c)
snow
d)
sand
30.

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

31.

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

32.

We can change the size and shape of an object by applying force.

a)

TRUE

b)

FALSE

33.

Which object will most likely move farthest with only 3 newtons of force?

a)

a paper clip

b)

a computer

c)

your science book

d)

a tissue box

34.

You are pushing a wheelbarrow. What happens to the wheelbarrow's motion if more mass is added and you push with the same force?

a)

The motion will remain the same

b)

The motion will increase.

c)

The motion will decrease.

d)

The motion will change directions.

35.

Your mom is shopping at Costco. As she adds more items into her cart, she will need to use less force to move the cart as its mass increases.

a)

True

b)

False

36.

A contact force is

a)

Touching

b)

Not Touching

37.

A non contact force is

a)

touching

b)

not touching

38.
a)

Contact Force

b)

Non contact Force

39.
a)

Contact Force

b)

Non contact Force

40.
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
41.

An object at rest stays at rest until an outside force acts upon it. Which law?

a)

1st

b)

2nd

c)

3rd

42.

For every action there is an equal and opposite reaction. Which law?

a)

1st

b)

2nd

c)

3rd

43.

When you jump on a diving board. You push down on the board and the board pushes you up. Which law applies

a)

1st

b)

2nd

c)

3rd

d)

no law applies

44.

What is a formula for force?

a)

F = mc

b)

F = ma

c)

F = mb

d)

F = m

45.

In the force formula,

a)

m = mass

b)

a = acceleration

c)

m= mass and a = acceleration

d)

m = mass and b = breadth

46.
If a 10 kilogram object accelerates suddenly at 15 m/s^2, how much force was applied to the object?
a)
150 Newtons
b)
15 Newtons
c)
150 kilograms
d)
100 kilograms
47.

If a force of 50 Newton's was applied to an object with a mass of 500 grams, what will the object's acceleration be? (Remember to use the correct SI units)

a)

10 m/s^2

b)

.1 m/s^2

c)

100 m/s^2

d)

1 m/s^2

48.

If an object with a mass of 30 kg is moving with an acceleration of 4 m/s^2 what was the force used to push the object.

a)

7.5 N

b)

0.13 N

c)

120 N

d)

34 N