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Forces

Total questions: 60

Worksheet time: 50mins

Name
Class
Date
1.
What will cause an object to move?
a)
Applied forces
b)
Balanced forces
c)
Unbalanced forces
2.

What is the unit to MEASURE force?

a)

Kilogram

b)

Meter

c)

Pounds

d)

Newton

3.
When forces are _________ the object DOES NOT move.
a)
unbalanced
b)
balanced
c)
heavy
d)
light
4.
The sum of all forces acting on an object.
a)
Contact Force
b)
Balanced Force
c)
Unbalanced Force
d)
Net Force
5.
What is the net force of an object that is not moving?
a)
0 N
b)
100 N
c)
Upward force
d)
10 N
6.
What is the net force?
a)
20 N 
b)
0 N 
c)
400 N 
d)
40 N 
7.

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.

8.
What is the net force?
a)
10 N
b)
0 N
c)
25 N
d)
1 N
9.
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.
10.
Calculate the Net Force. 
a)
60N, Left 
b)
40N, Right 
c)
0N
d)
60N, Right
11.
Calculate the Net Force. 
a)
40N, Left
b)
40N, Right
c)
0N, Balanced
d)
75N, Right
12.
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
13.
What is the net force?
a)
400 N Up
b)
400 N Down
c)
- 400 N Down
d)
800 N Down
14.
What force brings the pencil down?
a)
Applied
b)
Magnetic
c)
Normal
d)
Gravitational
15.

How could you describe a force?

a)

moving up and down

b)

going in and out

c)

a push or a pull

d)

hot and cold

16.

How would a magnet interact with these rubber bands?

a)

Nothing would happen.

b)

The magnet would repel the rubber bands.

c)

The magnet would attract the rubber bands.

d)

The rubber bands would stick to the magnets.

17.

Click ALL of the objects that would be attracted to a magnet.

a)
b)
c)
d)
18.

If 2 like poles are facing each other, the magnets will...

a)

do nothing.

b)

attract.

c)

fall.

d)

repel.

19.

A ball falling back to the ground is an example of which force?

a)

magnetism

b)

gravity

c)

electricity

d)

attraction

20.

Check ALL examples that show gravity at work.

a)
b)
c)
d)
21.

Which shows an example of unbalanced forces?

a)
b)
c)
d)
22.

When 2 forces are __________, the forces are balanced.

a)

unequal

b)

equal

c)

very strong

d)

weak

23.

Friction _____________ motion

a)

Works in the same direction as

b)

Opposes

c)

Has not effect on

d)

Pulls against

24.

True or False: objects that are smooth have LESS friction than objects that are rough

a)

TRUE

b)

FALSE

25.

When you jump out of a plane to go skydiving 🪂 you thankfully have a parachute so you can safely land 🛫. Which answer choice explains why the parachute helps you land safely

a)

While gravity pulls you down very quickly, Air Resistance (fluid friction) pushes back against gravity and your parachute, slowing you down

b)

While gravity pushes you down very slowly, Air Resistance (fluid friction) pulls back against gravity and your parachute, which means you can land safely

c)

When you have a parachute gravity is not able to pull you down as fast as it normally can

d)

The parachute will get caught on something on your way down which will save your life

26.

When you go down a slide which two forces are competing in a tug of war?

a)

Gravity and Sliding Friction

b)

Gravity and Rolling Friction

c)

Gravity and Your Friend Pushing You

d)

Gravity and Pushing Friction

27.

If you are unable to make it to the bottom of the slide, who won the tug of war between sliding friction and gravity?

a)

There is no winner, and your sad because you're stuck on a slide

b)

Gravity won

c)

Neither, its a tie

d)

Sliding friction won

28.

Which of these materials do you predict would have the MOST amount of friction

a)

Metal

b)

Tile

c)

Sand Paper

d)

Denim

29.

Friction is an example of _____________

a)

contact force

b)

non contact force

c)

both of these

d)

none of these

30.

When we rub our hands together _________.

a)

frictional force works between them

b)

energy is released

c)

our hands become warm

d)

all off the above

31.
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
32.
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
33.

Sliding friction is when two _____________ surfaces slide over one another.

a)

liquid

b)

oil

c)

solid

34.
What does friction produce?
a)
light
b)
sound
c)
heat
d)
gravity
35.
A type of friction that occurs when air pushes against a moving object causing it to decelerate.
a)
surface area
b)
air resistance
c)
velocity
d)
gravity 
36.
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
37.
why is the car on the right more stable?
a)
Its centre of mass is higher
b)
it has a wider base
c)
it has more height
d)
all of the above
38.
this cupboard is filled with boxes. will it topple over ?
a)
it will
b)
it will not
c)
it will if the weight remains inside the base
39.
What is the centre of mass ?
a)
it is a single point at which the object can balance.
b)
The mass is distributed equally around it.
c)
the centre of gravity of the object
d)
All of the above
40.
where is the centre of mass of this image
a)
at 20 mark
b)
at 42.5 mark
c)
at 50 mark
d)
at 100 mark
41.

The diagrams show four solid cones. The centre of mass of each cone is marked by a point labelled M.


Which cone is the most stable

a)

A

b)

B

c)

C

d)

D

42.

A plane lamina with centre of mass X touches the ground at point P. Which diagram shows the lamina in equilibrium?

a)
b)
c)
d)
43.

How many of these models will fall over?

a)

1

b)

2

c)

3

d)

4

e)

All of the models

44.
a)
b)
c)
d)
45.

What is the reference to the ability of an object to its original position after it has been tilted slightly?

a)

Stability

b)

Equilibrium

c)

Center of Gravity

d)

Turning Effect

46.

If we suspend a flat irregular solid at different positions, its center of gravity still along the:

a)

Plumb line

b)

Line of force

c)

Line of weight

d)

Gravity line

47.

Which of the following is NOT part of States of Equilibrium?

a)

Stable equilibrium

b)

Regular equilibrium

c)

Unstable equilibrium

d)

Neutral equilibrium

48.

When an object is tilted slightly and it topples over, the state is termed?

a)

Unstable equilibrium

b)

Stable equilibrium

c)

Neutral equilibrium

d)

Regular equilibrium

49.

The illustration shows a bunsen burner in 3 different positions. Which of these positions is the most stable?

a)

X

b)

Y

c)

Z

d)

W

50.

The diagram shows an old fashioned balance used to measure weights . Where is the fulcrum located?

a)

Y

b)

W

c)

Z

d)

X

51.

The point through which the whole weight of the body acts is called:

a)

Inertial point

b)

Center of gravity

c)

Centroid

d)

Equilibrium

52.

Center of Gravity of an object depends on its:

a)

Weight

b)

Mass

c)

Density

d)

Shape

53.

Center of Gravity is usually located where?

a)

more weight is concentrated

b)

less weight is concentrated

c)

less mass is concentrated

d)

more mass is concentrated

54.

In this illustrations, which factors affecting the stability of an object?

a)

Area of the base

b)

Position of CG

c)

Weight of an object

d)

Condition of equilibrium

55.

How does a person become more stable in relation to my COG?

a)

The higher the COG the more stable you are

b)

If the COG is in the centre of the BOS you are stable

c)

The lower the COG, the more stable you are

56.

Who is the most stable sports player ?

a)
b)
c)
d)
57.

A body is in balance and stability when:

a)

Centre of gravity is low

b)

Line of gravity falls within base of support

c)

Centre of gravity is over the base of support

d)

All of centre of gravity, line of gravity and base of support are in one line vertically

58.

Are these people most likely to be stable, unstable, balanced or unbalanced?

a)

Stable

b)

Unstable

c)

Balanced

d)

Unbalanced

59.

When a human stands in the anatomical position, where does centre of gravity naturally end up?

a)

Belly button

b)

Groin

c)

Chest

d)

Between knees

60.

which one is balance ?

a)
b)
c)

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