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WorksheetsYear 7 - Unit 7K Forces (without 7Kb) quiz
Total questions: 16
Worksheet time: 15mins
Name
Class
Date
1.
What can forces do?
a)
make things start or stop moving
b)
change the shape of things
c)
make moving things change direction
d)
all of the above
2.
Which answer shows three non-contact forces?
a)
magnetism, gravity, friction
b)
gravity, friction, upthrust
c)
gravity, static electricity, magnetism
d)
upthrust, static electricity, friction
3.
What are the units used for measuring forces?
a)
metres
b)
newtons
c)
kilograms
d)
grams
4.
Which is true?
a)
Your weight would be the same on the Earth and on the Moon.
b)
Your mass would be the same on the Earth and on the Moon.
c)
Your weight would be more on the Moon than on the Earth.
d)
Your mass would be less on the Moon than on the Earth.
5.
Which of the following sentences about friction is not correct?
a)
Friction can make an object get hotter.
b)
Friction wears car tyres away.
c)
Friction slows down a ball rolling in grass.
d)
Friction can speed up a falling object.
6.
Which of these would produce the most friction when they rub together?
a)
a rough surface and a smooth one
b)
two smooth surfaces
c)
two rough surfaces
d)
two smooth surfaces with oil between them
7.
Which example shows unhelpful friction?
a)
friction between a tyre and the road
b)
friction in the wheel axles of a bicycle
c)
friction between paper and the point of a pencil
d)
friction between your shoes and the floor
8.
Which of the following is not an example of a lubricant?
a)
grease for bicycle chains
b)
rubber on car tyres
c)
water on swimming pool tiles
d)
oil in a car engine
9.
If the same force is acting on an area, which of these statements is true?
a)
The size of the area does not matter.
b)
The bigger the area, the bigger the pressure.
c)
The smaller the area, the smaller the pressure.
d)
The smaller the area, the bigger the pressure.
10.
If all these birds are the same weight, which bird has the lowest pressure under its feet?
a)
A
b)
B
c)
C
d)
D
11.
Why is it easier to cut something with a sharp knife than with a blunt one?
a)
The area of the knife edge is large, so pressure is greater.
b)
The area of the knife edge is small, so pressure is greater.
c)
The area of the knife edge is large, so pressure is smaller.
d)
The area of the knife edge is small, so pressure is smaller.
12.
Which is not a unit for pressure?
a)
pascals
b)
newtons per square metre
c)
kilograms
d)
newtons per square centimetre
13.
Which pair of forces is balanced?
a)
A
b)
B
c)
C
d)
D
14.
Which of these things will not happen if there are unbalanced forces on an object?
a)
It will start to move.
b)
It will slow down.
c)
It will continue to move at the same speed.
d)
It will change direction.
15.
This drawing shows two forces on a car. What will happen to the car?
a)
It will speed up.
b)
It will slow down.
c)
It will decelerate.
d)
It will stay at the same speed.
16.
A car needs a force from its engine to keep moving because:
a)
everything needs a force to keep moving.
b)
gravity is acting to slow it down.
c)
it needs a force to balance friction and air resistance.
d)
weight balances friction.
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