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WorksheetsLost at Sea MBA yr 7
Total questions: 39
Worksheet time: 22mins
Name
Class
Date
1.
What is the force that causes objects to fall to Earth?
a)
Air resistance
b)
Gravity
c)
Water resistance
d)
Pressure
2.
What is the name of the units that we measure force in?
a)
Einsteins
b)
Newtons
c)
Kg
d)
Metres
3.
In which direction does gravity act?
a)
Downwards
b)
Upwards
c)
In all directions
d)
Towards the centre of the Earth
4.
Which is the correct definition of a 'force'?
a)
An influence, which cannot be measured, that causes something to move, stop moving or change direction.
b)
An influence, which can be measured, that causes something to move, stop moving or change direction.
c)
Something which has power.
d)
An influence, which can be measured, that causes something to move.
5.
What force does a parachute use to slow things down before hitting the ground?
a)
Friction
b)
Air resistance
c)
Water resistance
d)
Wind
6.
What type of force is air resistance?
a)
Contact
b)
Non-contact
7.
When two objects rub together, what force do they produce
a)
Gravity
b)
Air resistance
c)
Friction
d)
Water resistance
8.
Which of these uses friction?
a)
A parachute
b)
A ball falling through the sky
c)
Brakes on a bike
d)
A wind turbine
9.
A push or a pull that starts, stops or changes the direction of an object
a)
force
b)
energy
c)
gravity
d)
motion
10.
Can you transfer energy to another object
a)
True
b)
False
11.
a)
Balanced
b)
Unbalanced
12.
a)
Balanced
b)
Unbalanced
13.
What is the net force?
a)
30 N left
b)
25 N right
c)
5 N left
d)
55 N right
14.
What is the net force?
a)
40 N left
b)
0 N Balalnced
c)
400 N right
d)
40 N right
15.
Calculate the Net Force.
a)
40N, Left
b)
40N, Right
c)
0N, Balanced
d)
75N, Right
16.
Are forces balanced or unbalanced when a car is moving at a constant speed in a straight line?
a)
Balanced
b)
Unbalanced
17.
The amount of force pushing on an area is the definition of....
a)
Fluid
b)
Viscosity
c)
Barometer
d)
Pressure
18.
What pressure does a 4000N horse exert on the ground if each foot is 10cm2?
a)
40 N/cm2
b)
100 N/cm2
c)
400 N/cm2
d)
10 N/cm2
19.
If the horse reared up on 2 legs what effect would it have on the pressure?
a)
it will exert half the pressure it did before
b)
it will exert the same pressure it did before
c)
it will exert twice the pressure it did before
d)
it will exert four times the pressure it did before
20.
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
21.
Which of these animals would probably cause the greatest pressure on the ground?
a)
A fat cow with big feet
b)
A fat cow with small feet
c)
A calf with big feet
d)
A calf with small feet
22.
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
23.
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
24.
Where is pressure the greatest on the dam?
a)
D
b)
C
c)
B
d)
A
25.
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
26.
Look at the pressure triangle. How do we calculate the force?
a)
f ÷ a
b)
f x p
c)
p x a
d)
f ÷ p
27.
Pressure is measured in what units
a)
Newtons
b)
m/s
c)
Pascals
d)
Moles
28.
True or false:
Pressure depends on depth
Pressure depends on depth
a)
true
b)
false
29.
Hooke's Law describes the behaviour of which kind of material under tension?
a)
plastic
b)
metals only
c)
elastic
d)
non-metals only
30.
A stiff material has a:
a)
high spring constant
b)
low spring constant
c)
spring constant of any value
d)
spring constant which is difficult to predict
31.
What subject is attracted to a magnet?
a)
Silver
b)
Water
c)
Metal
d)
Iron
32.
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
33.
A north pole and a south pole will attract.
a)
True
b)
False
34.
True or False:
Most rocks are magnetic.
Most rocks are magnetic.
a)
True
b)
False
35.
True or False: All metals stick to magnets.
a)
True
b)
False
36.
Magnetism is a type of ____________
a)
force
b)
book
c)
plant
d)
animal
37.
Which statement is true?
a)
All Magnets have a North and South Pole
b)
All magnets can attract large objects
c)
Magnets can not pull through Solids.
d)
All Magnets have the Same shape and Size
38.
What will happen when these magnets are brought close together?
a)
They will attract each other.
b)
They will repel each other.
c)
Both magnets will turn to the left
d)
Both magnets will turn to the right
39.
Where is the force of attraction the strongest on a magnet?
a)
at the poles
b)
in the middle
c)
above the magnet
d)
below the magnet
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