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KS3 Y8 Topic 1 Forces

Total questions: 170

Worksheet time: 5hrs 31mins

Name
Class
Date
1.

What is a Force?

a)

The distance

b)

A Jedi mindtrick

c)

A push or pull

2.
 What is the unit called that measures force?
a)
Isaac
b)
Yee
c)
Newton
d)
kilogram
3.

The scientist who is most famous his work on forces

a)

Albert Einstein

b)

Stephen Hawking

c)

Sir Isaac Newton

d)

Galileo Galilei

4.
If these boys 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.
5.

A pull moves things _______ .

a)

Close to you

b)

Away from you

6.

A push moves things _______ .

a)

Close to you

b)

Away from you

7.

Which of the forces in this image is the smallest?

a)

A

b)

B

c)

C

d)

D

e)

E

8.

What type of force is needed to unlock a door?

a)

Pull

b)

Push

c)

Twist

d)

Jump

9.

What is an object doing when it is decelerating?

a)

Speeding up

b)

Slowing down

c)

Traveling at a constant speed

10.

The force that pulls objects towards Earth.

a)

Gravity

b)

Friction

c)

Force

11.

A force that results from two objects rubbing past each other.

a)

Gravity

b)

Friction

c)

Air Resistance

12.

The kicker applies a__________to the other karate master.

a)

Pull

b)

Pomegranate

c)

Pizza

d)

Push

13.

What tool is used to measure weight or force?

a)

Newton meter

b)

Ruler

c)

Stopclock

d)

Tape Measure

14.

What is this?

a)

Stop Watch

b)

Meter Stick

c)

Newton meter

d)

Test Tube

15.
A force can be described as ________
a)
A push or a pull.
b)
An up or a down.
c)
A left or a right.
d)
Movement.
16.
Which of these is not a contact force? 
a)
Tension
b)
Gravitational force
c)
Reaction force
d)
Friction
17.
Which one of the following statements is true?  
a)
Gravitational force only exists on Earth.
b)
Gravitational force can attract and repel.
c)
Gravitational force causes air resistance.
d)
Gravitational force is always attractive.
18.
In which situation is friction a useful force? 
a)
On a playground slide.
b)
In the moving parts of gears.
c)
Car tyres gripping the road.
d)
In a bicycle chain.
19.
What is a general name for a force that makes a vehicle move? 
a)
Thrust
b)
Friction
c)
Power
d)
Air resistance
20.
When a force can act without touching the object, what type of force is it?
a)
Friction
b)
Contact
c)
Non-contact
d)
Air resistance
21.
Which scientific instrument is used to measure forces? 
a)
Scale
b)
Force meter
c)
Force device
d)
Top pan balance<br />
22.
In which direction does air resistance always act? 
a)
Upwards
b)
Downwards
c)
Against the direction of movement.
d)
Behind boat sails.
23.
The name for the overall force acting on an object is
a)
The balance force.
b)
The strongest force.
c)
The weight force.<br />
d)
The resultant force.
24.
What is the size and direction of the normal reaction force which would balance a 50N dog? 
a)
5 kg upwards
b)
50 N upwards
c)
50 N downwards
d)
It is already balanced.
25.
For a boat to float, the upthrust and the weight must
a)
Be the same size in opposite directions.
b)
Both be upwards.
c)
Be identical.
d)
Add up to cause it to float.
26.

An apple has a mass of 0.2 kg. Calculate the weight of the apple on Earth (g = 10 N/kg).

(a)  

27.
What are the correct units of pressure?
a)
Newtons per square metre
b)
Coulombs
c)
Newtons
28.
Which example increases pressure?
a)
A drawing pin
b)
Snowshoes
c)
A long level
29.

Mass is measured in kg (which means kilograms)

Force is measured in N

What does N stand for?

a)

nothings

b)

newtons

c)

newts

d)

nells

30.

True or false:

A force can change the speed of an object, but it can’t change its direction of movement

a)

False

b)

True

31.

True or false:

Friction will always try to slow down a moving object

a)

False

b)

True

32.

A ball is falling through the air because gravity is pulling it down. As the speed increases, does the force of air resistance on the ball increase or decrease?

a)

decrease

b)

increase

33.

What does it mean when two forces are said to be “balanced”?

a)

It means that the object is not moving.

b)

It means that the two forces are both equally pushing down, so nothing can change.

c)

It means that the two forces are both equally pushing down, so nothing can move.

d)

It means that the two forces are the same size and act on the object in opposite directions. (So the overall effect is no change in speed.)

34.

True or false:

If all the forces acting on a moving object are balanced, the object will slow down and stop?

a)

False

b)

True

35.

What force keeps the Moon in orbit around the Earth?

a)

Art

b)

Friction

c)

Gravity

d)

Magnetism

e)

The strong nuclear force

36.

Select the correct statement:

a)

Mass is the amount of matter ("stuff")

in something.

b)

Weight is the amount of matter ("stuff")

in something.

37.

Select the correct statement:

a)

The mass of something is the force you get when the force of gravity acts on the mass.

b)

The mass of something is the force you get when the force of gravity acts on the weight.

c)

The weight of something is the force you get when the force of gravity acts on the mass.

d)

The weight of something is the force you get when the force of gravity acts on the weight.

38.

True or false:

An object will have the same mass on Earth as it has on the Moon.

a)

False

b)

True

39.

True or false:

An object will have the same weight on Earth as it has on the Moon.

a)

False

b)

True

40.

Is this correct?

a)

Yes

b)

No

41.

What units are forces measured in?

a)

Newtons (N)

b)

Kilograms (kg)

c)

Joules (J)

d)

Meters (m)

42.

What type of force acts when two objects are physically touching each other?

a)

Non-contact force

b)

Contact force

c)

Magnetic force

d)

Gravitational force

43.

How are forces represented in diagrams?

a)

With arrows

b)

With numbers

c)

With dots

d)

With letters

44.

What does a resultant force of zero indicate about an object's motion?

a)

The object will change direction

b)

The object will accelerate

c)

The object will slow down

d)

The object will either remain stationary or keep moving at the same speed

45.

Which force acts against an object as it travels through air?

a)

Friction

b)

Tension

c)

Gravitational

d)

Air resistance

46.

What type of force is friction?

a)

A non-contact force

b)

A magnetic force

c)

A contact force

d)

An upthrust force

47.

Which force pulls an object towards other objects with mass?

a)

Magnetic

b)

Tension

c)

Gravitational

d)

Thrust

48.

What is the force called that is produced by magnets?

a)

Frictional force

b)

Reaction force

c)

Gravitational force

d)

Magnetic force

49.

What type of force allows objects to float?

a)

Friction

b)

Magnetic

c)

Gravitational

d)

Upthrust

50.

Which force is responsible for keeping planets in orbit around the sun?

a)

Magnetic force

b)

Gravitational force

c)

Electrostatic force

d)

Frictional force

51.
If these boys 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.
52.

What is the net force on the block? (The overall force)

a)

5 Newtons up

b)

5 Newtons down

c)

15 Newtons up

d)

15 Newtons down

53.

The unit of measurement for forces is

a)

Joules

b)

Meters

c)

Kilograms

d)

Newtons

54.

If there were no forces acting on a moving object it would

a)

stay in motion

b)

come to a stop

c)

lose speed

d)

gain speed

55.
What will cause an object to move?
a)
Applied forces
b)
Balanced forces
c)
Unbalanced forces
56.
Balanced or Unbalanced?
a)
Balanced 
b)
Unbalanced
57.

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.

58.

What is terminal velocity?

a)

Constant speed in a certain direction

b)

Changing speed in a certain direction

c)

Changing direction

d)

Slowing down in one direction

59.

What force acts on a skydivers parachute?

a)

Gravity

b)

Weight

c)

Air resistance

d)

Thrust

60.

To calculate weight...

a)

Weight = gravity ÷ mass

b)

Weight = distance x time

c)

Weight = volume x distance

d)

Weight = mass x gravity

61.

What is the gravitational strength of Earth?

a)

100 N

b)

10 N

c)

9.8 N/kg

d)

7.6 N/kg

62.
What force ultimately slows the roller coaster to a stop?
a)
Applied
b)
Normal
c)
Friction
d)
Magnetic
63.
An _______ force must act on an object for it to CHANGE it's motion
a)
balanced
b)
unbalanced
c)
gravitational
d)
electrical
64.

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

a)

balanced

b)

unbalanced

65.
How could you make an object increase its speed?
a)
use less force
b)
use more force
c)
use no force
66.
Forces that happen between objects that touch are called _____________.
a)
magnetism
b)
gravity
c)
slippery
d)
contact forces
67.

Which one of these arrows best corresponds to the force of

drag?

a)

Green arrow

b)

Purple arrow

c)

Yellow arrow

d)

Red arrows

68.

Which place has more gravity?

a)

Moon

b)

Earth

69.

What is friction?

a)

Friction is a force that is against motion

b)

Friction is the force of attraction that any mass produces.

c)

Friction is a force that increases motion.

70.

What force is acting upwards on the book?

a)

Gravity

b)

Friction

c)

Thrust

d)

Reaction force

71.

The units of force are

a)

Newtons

b)

Kilograms

c)

N/m2

72.

Pressure is equal to force divided by what

a)

area

b)

mass

c)

time

73.

Army tank tracks are useful for travelling through the mud because..

a)

they decrease the force the vehicle exerts on the ground

b)

they increase the force the vehicle exerts on the ground

c)

they decrease the pressure the vehicle exerts on the ground

74.

Where would you find the largest pressure?

a)

Under a snowshoe

b)

At the tip of a pin

75.

The units of pressure are

a)

N

b)

N/m2

c)

m2

76.

Why does a knife exert a large pressure on a tomato?

a)

Because it has a large area

b)

Because it has a small area

77.

Would you rather stand on one nail or 100 nails?

a)

1

b)

100

78.

Pressure =

a)

me, now I am in Y8

b)

force x area

c)

force / area

79.

How do you increase pressure?

a)

Make the area bigger

b)

Make the area smaller

c)

Make the force smaller

80.

How do you decrease pressure?

a)

Make the area bigger

b)

Make the area smaller

81.

What happens to the pressure in a liquid as you go deeper?

a)

The pressure decreases

b)

The pressure increases

c)

The pressure becomes zero

d)

The pressure remains the same

82.

What is the pressure in a solid?

a)

Force applied on a unit area of the solid's surface

b)

Temperature of the solid

c)

Color of the solid

d)

Volume of the solid

83.

Which of the following is a non-contact force?

a)

Gravity

b)

Friction

c)

drag

d)

Magnetic

84.

Which of the following is an example of contact force?

a)

Friction

b)

Gravity

c)

Magnetism

d)

Tension

85.

What is the pressure exerted by a 500 N force on an area of 2 m^2?

a)

750 Pa

b)

1000 Pa

c)

250 Pa

d)

1500 Pa

86.

Where is the pressure greatest?

a)

At the surface of the ocean

b)

In the middle of the ocean

c)

At the bottom of the ocean

87.
What do we call the the amount of force exerted on a certain area?
a)
fluid
b)
pressure
c)
buoyant
88.

Water pressure decreases as depth increases

a)

false

b)

true

89.

Which of these animals would probably cause the greatest pressure on the ground?

a)

A large cow with big feet

b)

A large cow with small feet

c)

A baby cow with big feet

d)

A baby cow with small feet

90.
Look at the pressure triangle. How do we calculate the area?
a)
f ÷ a
b)
f x p
c)
p x f
d)
f ÷ p
91.

Forces are measured in....

a)

Kilograms

b)

Newtons

c)

Centimetres

d)

kg/N

92.

Forces are measured using a ….

a)

calculator

b)

Balance

c)

Ruler

d)

Newton meter

93.

Forces can make objects....

a)

Speed up or start

b)

Slow down or stop

c)

Change direction, turn and change shape.

d)

All of the above

94.

The tennis ball will move in which direction?

a)

Up

b)

Right

c)

Down

d)

Left

95.

Which forces are correct?

a)

up is weight, down is air resistance

b)

up is weight, down is friction

c)

up is air resistance, down is friction

d)

up is air resistance, down is weight

96.

 Pressure can be calculated using the equation:

a)

Pressure = Force ÷\div Area

b)

Pressure = Area  ÷\div Force

c)

Pressure = Force x Area

d)

Pressure = Force + Area

97.

Pressure is measured in ….

a)

newtons

b)

m/N2

c)

N/m2

d)

N/cm2

98.

Where is atmospheric pressure the lowest?

a)

seaside

b)

hill

c)

mountain

d)

cave

99.

A parachute slows down a sky diver because it increases...

a)

Air resistance

b)

Friction

c)

Drag

d)

All of the above

100.

Pressure is higher when the force is concentrated on a small area.

a)

True

b)

False

101.

As the area increases the pressure increases

a)

True

b)

False

102.

As the area decreases the force gets smaller.

a)

True

b)

False

103.

Flip flops would leave a deeper dent in sand than stiletto heels.

a)

True

b)

False

104.

Pressure is measured in N/m2.

a)

True

b)

False

105.

The can collapsed because....

a)

The pressure on the inside was equal to the pressure on the outside.

b)

The pressure on the inside was greater than the pressure on the outside

c)

The pressure on the inside was less than the pressure on the outside

106.

The balloon did not pop because.....

a)

The bed of nails had a higher pressure than the single nail

b)

The bed of nails had a lower pressure than the single nail

c)

The bed of nails had an equal pressure than the single nail

107.

Polar bears have wide feet because...

a)

Wide feet have a large surface area so less likely to sink in the snow

b)

Wide feet have a small surface area so less likely to sink in the snow

c)

Wide feet have an equal surface area so less likely to sink in the snow

108.

Pressure = Force x area

a)

True

b)

False

109.

What is the correct equation for pressure?

a)

P = FxA

b)

P= A/F

c)

P=F/A

110.
Friction is a force that acts in an ___________ direction of movement.
a)
similar
b)
opposite
c)
parallel
d)
west
111.
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 
112.
How does friction affect speed?
a)
more friction decreases speed
b)
more friction increases speed
c)
less friction decreases speed
113.
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
114.
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
115.
The rougher the surface, the faster an object will travel over the surface.
a)
True
b)
False
116.
When two surfaces rub, the irregularities of one surface get caught on those of the other surface?
a)
True
b)
False
117.
If extension = Stretched length - original length. What is the extension of spring D.
a)
1mm
b)
2mm
c)
3mm
d)
0mm
118.
Where would you find the largest pressure?
a)
At the bottom of the ocean
b)
At the top of Mt Everest
c)
Close to ground on the Scotch oval
d)
In a rockpool on the Great Barrier Reef
119.
If the pressure in a balloon remains constant what happens to the balloon's volume as the temperature of the air increases?
a)
the balloon shrivels up
b)
balloon expands
c)
balloon stays the same size
d)
balloon shrinks
120.
Which of the statements is true?
a)
The bottom of the boot exerts more pressure than the high-heeled shoe as a result of an increase in surface area.
b)
The bottom of the high-heeled shoe exerts more pressure than the boot as a result of an decrease in surface area.
c)
The bottom of the high-heeled shoe exerts the same pressure as the bottom of the boot.
121.

A force is applied to a ball and the ball squashes. When the force is removed, the ball returns to its original shape. The ball is...

a)

an elastic object

b)

an equilibrium object

c)

an unelastic object

d)

an inelastic object

122.

A force is applied to a lump of modelling clay, compressing it. When the force is removed, the clay does not return to it's original shape because it is...

a)

an elastic object

b)

an inelastic object

c)

an equilibrium object

d)

an unelastic object

123.

Pressure inside an inflated balloon is due to...

a)

The air particles being compressed together inside the balloon

b)

Particle colliding with the inside surface of the balloon

c)

A higher number of air particles outside the balloon

d)

The pressure inside and outside the balloon being in a state of equilibrium

124.

When a force is applied to an object it can change its...

(a)  

125.

When we apply a force to an object to change its shape, what is this called?

a)

Extension

b)

Deformation

c)

Squashing

d)

Stretching

126.

Which materials will return back to their original shape when they have been stretched?

a)

Plastic

b)

Elastic

c)

Inelastic

d)

Metals

127.

What is extension?

a)

The original length of the spring.

b)

The amount of length the spring has increased by.

c)

More time to complete the question.

d)

The new length of the spring.

128.

The original length of a spring is 10cm, its extended length is 30cm. What is the extension?

a)

10

b)

20

c)

30

d)

40

129.

What happens when a spring reaches its elastic limit?

a)

The force applied to the spring is equal to its elongation.

b)

Hooke's law ceases to be valid.

c)

The spring constant increases.

d)

The spring can be stretched out but will revert back to its original shape.

130.

Who created Hooke's law?

a)

Robert Hooke

b)

Isaac Newton

c)

Albert Einstein

d)

Dmitri Mendeleev

131.

What is Hooke's Law?

a)

The force applied to the spring is proportional to its extension.

b)

The fore applied to the spring is equal to its extension.

c)

The force applied is equal to the spring constant.

d)

The spring constant is equal to the extension.

132.

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

133.

A graph of extension against force for an elastic material is:

a)

A downward curve

b)

An upward curve

c)

A straight line from the origin

d)

A straight line from any point on the x and y axis

134.
1. A _________is a simple machine with a fulcrum and a rigid bar.
a)
Pivot
b)
Lever
c)
Wedge
135.
3. Which type of lever is this?
a)
First Class Lever
b)
Second Class Lever
c)
Third Class Lever
136.
2. The place where a lever pivots is called the _______.
a)
Pivot point
b)
Tissue
c)
Fulcrum
137.
How many types of levers are there?
a)
1
b)
2
c)
3
d)
4
138.
A see saw is an example of a:
a)
1st class lever
b)
2nd class lever
c)
3rd class lever
139.
What is the anticlockwise moment acting on this crane?
a)
80,000Nm
b)
100,000Nm
c)
120,000Nm
d)
140,000Nm
140.
Unit of force.
a)
Meter
b)
Centimeter
c)
Newton
141.
What is the moment acting on the seesaw?
a)
1.6Nm
b)
15Nm
c)
16N
d)
4Nm
142.
Moment is bigger if the force acts further  from turning point
a)
TRUE
b)
FALSE
143.
What is the moment produced by the 15 N?
a)
15 Nm (clockwise)
b)
150 Nm (anti - clockwise)
c)
1.5 Nm (anti - clockwise)
d)
0.15 Nm (clockwise)
144.

True or false:


The weight of a person sitting on a see-saw is known as the load.

a)

true

b)

false

145.

Complete:


Moment = ___ x distance from ___.

a)

pivot, force

b)

load, pivot

c)

force, pivot

d)

force, middle

146.

A boy of weight 600N sits on the see-saw as shown at a distance of 1.5m from the pivot. What is the force F required at the other end to balance the see-saw?

a)

450 N

b)

350 N

c)

4.5 N

d)

200 N

147.

What do we call forces applied to anything that turns?

a)

Minute

b)

Moment

c)

Minimum

d)

Monument

148.

What do we use to calculate the size of a turning force (moment)?

a)

Work x Force

b)

distance from pivot / Force

c)

Force / distance from pivot

d)

Force x distance from pivot

149.

What is the size of the moment shown by the black arrow?

a)

30 Nm

b)

36 Nm

c)

40 Nm

d)

60 Nm

150.

The word ‘fulcrum’ is another name for what?

a)

load

b)

effort

c)

pivot

d)

middle

151.

True or false:


The weight of a person sitting on a see-saw is known as the load.

a)

true

b)

false

152.

Complete:


Moment = ___ x distance from ___.

a)

pivot, force

b)

load, pivot

c)

force, pivot

d)

force, middle

153.

True or false:


A small force moved over a large distance results in a large force moved over a small distance.

a)

true

b)

false

154.

What are the units of (turning) moments?

a)

nm

b)

mn

c)

Mn

d)

Nm

155.

True or false:


A person lifting the handles of a wheelbarrow is applying effort.

a)

true

b)

false

156.

True or false:


The bigger the force the lower the turning effect.

a)

true

b)

false

157.

Where is the pivot on a wheelbarrow

a)

the handles

b)

where the contents of the wheelbarrow

c)

where the wheel is

158.

True or false:


A force is generated when a molecule of a gas or liquid hits an object.

a)

true

b)

false

159.

Complete:


The ___ is the force someone is applying to a lever.

a)

load

b)

effort

c)

force

160.
We use levers to make work easier.?
a)
True
b)
False
161.
What is the anticlockwise moment acting on this crane?
a)
80,000Nm
b)
100,000Nm
c)
120,000Nm
d)
140,000Nm
162.
Unit of force.
a)
Meter
b)
Centimeter
c)
Newton
163.
What is the moment acting on the seesaw?
a)
1.6Nm
b)
15Nm
c)
16N
d)
4Nm
164.
What is the moment produced by the 15 N?
a)
15 Nm (clockwise)
b)
150 Nm (anti - clockwise)
c)
1.5 Nm (anti - clockwise)
d)
0.15 Nm (clockwise)
165.

A boy of weight 600N sits on the see-saw as shown at a distance of 1.5m from the pivot. What is the force F required at the other end to balance the see-saw?

a)

450 N

b)

350 N

c)

4.5 N

d)

200 N

166.

What to we call forces applied to anything that turns?

a)

Minute

b)

Moment

c)

Minimum

d)

Monument

167.

What do we use to calculate the size of a turning force (moment)?

a)

Work x Force

b)

distance from pivot / Force

c)

Force / distance from pivot

d)

Force x distance from pivot

168.

What is the size of the moment shown by the black arrow?

a)

30 Nm

b)

36 Nm

c)

40 Nm

d)

60 Nm

169.

How would you calculate this moment?

a)

40 cm / 50 N

b)

50 N / 40 cm

c)

50 N x 40 cm

170.

What is the size of this moment?

a)

2000 Ncm

b)

150 Ncm

c)

30 Ncm

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