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KS3 Work & Pressure

Total questions: 45

Worksheet time: 24mins

Name
Class
Date
1.

units of force are

a)

newtons

b)

grams

c)

joules

d)

meters

2.

units for work are

a)

newtons

b)

joules

c)

meters

d)

seconds

3.

if you push a cart with a force of 60 N for 2 m... how much work have you done

a)

120 J

b)

30 J

c)

120 N

d)

30 N

4.
What is the formula for work?
a)
Force = work x distance
b)
Distance = force x work
c)
Work = force x distance
d)
Work = force x mass
5.
Would it be easier to move a box of the same mass up a ramp that was long and gradual or short and steep?
a)
long and gradual
b)
short and steep
6.
Which of the following is the best example of work being done. 
a)
doing homework
b)
lifting a box
c)
pushing a stationary box
d)
holding a box
7.
A 5000N block is lifted 10 m. How much work was done?
a)
50000 J
b)
5000 J
c)
500 J
d)
50 J
8.
3. Which type of lever is this?
a)
First Class Lever
b)
Second Class Lever
c)
Third Class Lever
9.
WHAT ARE THE 3 MAIN PARTS OF A LEVER?
a)
FOOT, EFFORT, REPORT
b)
FULCRUM, STRUCTURE, EFFORT
c)
FULCRUM, EFFORT, LOAD
10.
For a lever to be a first class lever the fulcrum needs to be ..
a)
between the load and the effort
b)
on one side and the load and effort on the other side 
c)
on the same side as the load arm. 
11.
6. What kind of lever is this?
a)
First Class Lever
b)
Second Class Lever
c)
Third Class Lever
12.
1st and 2nd class levers are ____ while 3rd class levers are _____
a)
Force multipliers, speed multipliers
b)
Speed multipliers,force multipliers
c)
Force multipliers, force multipliers
d)
Speed multipliers, speed multipliers
13.
A see saw is an example of a:
a)
1st class lever
b)
2nd class lever
c)
3rd class lever
14.
A wheelbarrow is an example of a:
a)
1st class lever
b)
2nd class lever
c)
3rd class lever
15.

What type of lever

a)

First Class Lever

b)

Second Class Lever

c)

Third Class Lever

16.

What class lever does this picture show?

a)

1st

b)

2nd

c)

3rd

17.
1. A _________is a simple machine with a fulcrum and a rigid bar.
a)
Pivot
b)
Lever
c)
Wedge
18.
What is the anticlockwise moment acting on this crane?
a)
80,000Nm
b)
100,000Nm
c)
120,000Nm
d)
140,000Nm
19.
What is the moment acting on the seesaw?
a)
1.6Nm
b)
15Nm
c)
16N
d)
4Nm
20.
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)
21.
A seesaw is unbalanced with two people of different masses sitting equal distances from the center. Which of the following will result in equilibrium?
a)
The larger person moving further away from the center.
b)
Moving the smaller person closer to the center.
c)
Moving the smaller person further from the center.
d)
Making the larger person do nothing.
22.

Two masses of mass 10.0 and 6.0 kg are hung from massless strings at the end of a light rod. The rod is virtually weightless. A pivot (fulcrum) is placed off center and the system is free to rotate. If the 6.0 kg mass is 4.0 m away from the pivot, how far away is the 10.0 kg mass if the system is not rotating?

a)

0.42 m

b)

2.4 m

c)

4.8 m

d)

4.2 m

23.

A nut can be loosened more easily with

a)

a short spanner because a larger turning effect can be produced.

b)

a long spanner because a larger turning effect can be produced.

c)

a long spanner because a larger force can be produced.

d)

a short spanner because a larger force can be produced.

24.

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

25.
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
d)
they increase the pressure the vehicle exerts on the ground
26.
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
27.
What is the difference between particles in a gas and a solid?
a)
gas particles are closer together
b)
solid particles move faster than gas particles
c)
solid particles expand on heating
d)
gas particles have more kinetic energy than solid particles
28.
Where is pressure the greatest on the dam?
a)
D
b)
C
c)
B
d)
A
29.
Pressure is measured in what units
a)
Newtons
b)
m/s
c)
Pascals
d)
Moles
30.
Pressure is equal to force divided by what
a)
area
b)
mass
c)
time
d)
distance
31.
Pressure can be measured in Pascales (Pa) or Newtons per square metre.
1 Pa = 1N/m2
a)
True
b)
False
32.
The pressure resulting from a force of 50 N exerted over an area of 5 m2 is
a)
10 N
b)
0.1 N
c)
10 N/m2
d)
0.1 Pa
33.

When you increase your depth under water, the water pressure on your body

a)

increases

b)

decreases

c)

stays the same

34.
What decreases as you go up in the atmosphere?
a)
Altitude
b)
Atmosphere
c)
Meteors
d)
Air Pressure
35.

Diagram shows the design of a dam. Why does the thickness of the dam increase with its depth?

a)

The design of this structure is stronger.

b)

Water pressure increases with depth.

c)

The cost of construction is lower.

d)

Water pressure acts uniformly in all directions.

36.

An object will float on water if it is

a)

less dense than water.

b)

more dense than water.

c)

the same density as water.

37.
Car brakes and car jacks are examples of
a)
hydraulic systems
b)
archimedes' principle
c)
atmospheric pressure
d)
buoyancy
38.
Instruments used to measure air pressure are called
a)
thermometers
b)
hygrometers
c)
hydrometers
d)
barometers
39.
The hot tin becomes dented when cold water was poured onto it. Which of the following causes the occurrence?
a)
Air pressure outside the tin has compressed it
b)
The volume of water in the tin has decreased
c)
Air pressure inside the tin has increased
d)
Air pressure outside the tin has decreased
40.
The gas pressure in a container increases when the
a)
gas is cooled
b)
volume of the container is reduced
c)
number of gas particles decreases
d)
volume of the container is increased
41.
The activity in the diagram above is carried out to study the factor that affects air pressure.What will be observed at the end of activity?
a)
The balloon contracts
b)
The balloon expands
c)
The balloon floats on the surface of water
d)
The water diffuses into the balloon
42.
Which of the following statements is true about air pressure?
a)
Acts in all directions
b)
Fixed at all places on the Earth
c)
Is not affected by heat
d)
High at the top of a mountain
43.
Which of the following can be done to increase the air pressure in the container in the diagram above?
a)
Heat the container
b)
Immerse the container in cold water
c)
Decrease the number of gas particles
d)
Add a few drops of concentrated acid onto the container
44.
Which is the force made on the piston?
a)
400 N
b)
100 N
c)
40 N
d)
1000 N
45.

The figure shows a pond with two fish P and Q.

What is the correct relation of the water pressures on fish P and fish Q?

a)

Water pressure on fish Q > Water pressure on fish P.

b)

Water pressure on fish Q < Water pressure on fish P.

c)

Water pressure on fish Q = Water pressure on fish P.

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