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FORCE

Total questions: 70

Worksheet time: 1hrs 3mins

Name
Class
Date
1.

What is the force that causes objects to fall to Earth?

a)

Friction

b)

Gravity

c)

Magnetism

d)

Pressure

2.
What is the name of the units that we measure force in?
a)
Einsteins 
b)
Newtons
c)
Kg
d)
Metres
3.

When two objects rub together, what force do they produce

a)

Gravity

b)

Magnetism

c)

Friction

d)

Heat

4.
Which of these uses friction?
a)
A parachute
b)
A ball falling through the sky
c)
Brakes on a bike
d)
A wind turbine
5.

A softball is tossed outside a window. Which two forces will act on the ball's motion as the ball flies and then hits the ground?

a)

gravity and friction

b)

friction and heat

c)

magnetism and gravity

6.

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.

7.

Your mom is shopping at HEB. 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

8.

Which slide would you be able to go faster down?

a)
b)
9.

A horse was pulling an empty buggy, but then 5 people hopped on. What does the horse driver need to know about forces and motion to keep everyone safe while driving?

a)

The buggy has more mass now, so he will need more room to turn.

b)

The buggy has less mass now, so there is nothing to worry about.

c)

The buggy has more mass now, so he needs more time to brake.

10.

An icy road would have ________ friction.

a)

more

b)

less

11.

The Sun has the greatest pull of gravity. This is why Earth does not float away in space.

a)

True

b)

False

12.

Some students wanted to find out if a tennis ball and a baseball dropped from the same height hit the ground at the same time. This investigation tests the effect of which of the following?

a)

wind

b)

friction

c)

gravity

d)

magnetism

13.

Students are investigating motion with a rubber band car. They want to know how the number of winds of the rubber band affects how the car moves. They will record the number of winds of the rubber band. What other data will they need to collect?

a)

The distance the car travels when released

b)

The length of the rubber band during each trial

c)

The amount of time it takes to wind the propeller

d)

The width of the surface on which the car moves

14.

If a student has two magnets, how might it be determined which magnet is stronger?

a)

Count how many paper clips each magnet can lift.

b)

Submerge each magnet in a bowl of water.

c)

Examine each magnet to determine the north pole.

d)

Measure the length and the mass of both magnets.

15.

Students conducted an investigation in which they rolled a soda can down a ramp that was 30 cm high and one that was 40 cm high. Which question were the students most likely trying to answer?

a)

How does mass of a soda can affect the distance it will roll?

b)

How does surface friction affect the distance a soda can will roll?

c)

How does the size of a soda can affect the distance it rolls?

d)

How does ramp height affect the distance a soda can rolls?

16.

Students conducted an investigation in which they measured the distance a toy car traveled after rolling down a ramp covered with sandpaper or wax paper. Which of these questions can the students answer by analyzing the results of their investigation?

a)

How does changing the height of a ramp affect the distance a toy car rolls?

b)

How does changing the surface of a ramp affect the distance a toy car rolls?

c)

How does mass affect the distance a toy car moves after rolling down a ram?

d)

How does the design of a toy car affect its movement after rolling down a ramp?

17.

Students conducted an investigation in which they let the same car roll down the same ramp in three different locations in their school with three different floor types, as shown in the picture. Which of the following questions was this investigation most likely designed to answer?

a)

How does the mass of the toy car affect its speed?

b)

How does friction affect the distance a toy car rolls?

c)

What mechanical advantage does an inclined lane give?

d)

Why does gravity make a toy car roll down a ramp?

18.
What happens when two north poles of a magnet are placed together?
a)
they repel
b)
they attract
c)
they cancel each other out
d)
the strength of the magnet is doubled
19.
A north pole and a south pole will attract.
a)
True
b)
False
20.

Which force must have the objects touching in order for it to work?

a)

gravity

b)

friction

c)

magnestism

d)

all of them

21.

Force is a vector quantity because it has both (a)   and direction

22.

When a force is applied to a spring, it stretches. The (a)   the force applied, the longer the spring stretches.

23.
What is the net force?
a)
20 N 
b)
0 N 
c)
400 N 
d)
40 N 
24.
What is the net force?
a)
10 N
b)
0 N
c)
25 N
d)
1 N
25.
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.
26.

Forces that have a net force of zero Newtons

a)

Balanced force

b)

Unbalanced force

27.
The sum of all forces acting on an object.
a)
Contact Force
b)
Balanced Force
c)
Unbalanced Force
d)
Net Force
28.
What will cause an object to move?
a)
Applied forces
b)
Balanced forces
c)
Unbalanced forces
29.
Calculate the Net Force. 
a)
60N, Left 
b)
40N, Right 
c)
0N
d)
60N, Right
30.
Calculate the Net Force. 
a)
40N, Left
b)
40N, Right
c)
0N, Balanced
d)
75N, Right
31.
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
32.
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.
33.
What is the net force?
a)
400 N Up
b)
400 N Down
c)
- 400 N Down
d)
800 N Down
34.

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.

35.

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

36.

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

37.

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

38.

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

39.

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

40.
Jonny and Patty are pushing against a basketball. Both of them push against theball on opposite sides with a force of 20 N to keep the ball still. What is the net force?
a)
400 N
b)
24 N
c)
0 N
d)
40 N
41.
What is 'drag' another name for?
a)
dressing up
b)
air resistance
c)
friction
d)
weight
42.
Name two quantities that are vectors.
a)
force and speed
b)
speed and acceleration
c)
force and acceleration
d)
mass and weight
43.
What are balanced forces?
a)
forces of the same size, in opposite directions
b)
the same size in the same direction
c)
forces in opposite directions
d)
forces at right angles to each other
44.
What is the name for a single force on an object with the same effect as all the forces combined?
a)
big
b)
total
c)
resultant
d)
sum
45.

What is the resultant force?

a)

40 N, Left

b)

0 N, Balanced

c)

400 N, Right

d)

40 N, Right

46.

What is the resultant force?

a)

17 N, Left

b)

6N, Right

c)

11N , Left

d)

12N, Left

47.

Calculate the resultant force acting on the truck.

a)

15 N to the right

b)

15 N to the left

c)

35 N to the right

d)

35 N to the left

48.

Calculate the resultant force acting on the parachute.

a)

19 N upwards

b)

19 N downwards

c)

5 N upwards

d)

5 N downwards

49.

Calculate the resultant force acting on the fish.

a)

7 N to the left

b)

7 N to the right

c)

47 N to the left

d)

47 N to the right

50.

The resultant force acting on the ball is ...

a)

6 N upwards.

b)

6 N downwards.

c)

30 N downwards.

d)

30 N upwards.

51.
As mass increases, what happens to gravitational force?
a)
increases
b)
decreases
c)
stays the same
d)
i don't know
52.
As distance between two objects increase the pull of gravity 
a)
Increases
b)
Decreases
c)
Stays the same
53.
Which has a STRONGER force of gravity, Earth or the Moon?
a)
Earth
b)
Moon
54.
Which has more mass, Earth or the Moon?
a)
Earth
b)
Moon
c)
The same
55.
A person would weigh less on on the Moon than on the Earth because . . .
a)
Moon has more mass, and therefore more gravity
b)
Moon has less mass, and therefore more gravity
c)
Moon has more mass, and therefore less gravity
d)
Moon has less mass and therefore less gravity
56.

What force causes objects falling near Earth's surface to slow down?

a)

Gravity

b)

force

c)

air resistance

d)

Newtons

57.

The gravitational attraction between two objects would increase if both masses are –

a)

increased, and the distance between them is increased.

b)

increased, and the distance between them is decreased.

c)

decreased, and the distance between them is decreased.

d)

decreased, and the distance between them is increased.

58.

Why are we pulled to Earth's center and NOT the sun's?

a)

The sun is very LARGE

b)

The sun is very FAR AWAY

c)

Earth has a STRONGER GRAVITY than the sun

d)

Earth ORBITS around the sun

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59.

Which of the following will NOT change in different gravities?

a)

Weight

b)

force

c)

mass

d)

pounds

60.

Where would you have more mass, on Earth or on the Moon?

a)

Earth

b)

Moon

c)

It is the same, mass doesn´t change

d)

In both planets

61.
When two objects rub together, what force do they produce
a)
Gravity
b)
Air resistance
c)
Friction
d)
Water resistance
62.

If an object weighing 30 N displaces a volume of water with a weight 20 N, what is the buoyant force on the object?

a)

10N

b)

20N

c)

30N

d)

50N

63.

If an object weighing 75 N displaces a volume of water with a weight 40 N, what is the buoyant force on the object?

a)

35N

b)

40N

c)

75N

d)

115N

64.

The upward force that fluids exert on all matter.

a)

Pascal

b)

Fluid

c)

Atmospheric

d)

Buoyant

65.

An object weighing 40 N displaces a volume of water with a weight 75 N. What will the object do?

a)

It will sink

b)

It will float

c)

It will fly

d)

None of these answers

66.

All fluids exert an upward force called buoyant force.

a)

True

b)

False

67.

Buoyant force is caused by differences in fluid pressure.

a)

True

b)

False

68.

You can change density of an object by changing the object’s mass.

a)

True

b)

False

69.

If an object weighing 20 N displaces a volume of water with a weight 15 N, what is the buoyant force on the object?

a)

5N

b)

15N

c)

25N

d)

35N

70.

Which of the following would not affect the level at which a cargo ship floats in a body of water?

a)

The depth of the water

b)

The mass of the ship’s cargo

c)

The volume of the ship

d)

The density of the ship’s material