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Y8 Forces and Motion

Total questions: 55

Worksheet time: 2hrs 43mins

Name
Class
Date
1.

A student is pushing a book with a force of 10 Newtons to the left. Another student is pushing the book to the right. How many Newtons of force is the second student pushing with if the book is not moving?

a)

10 Newtons

b)

5 Newtons

c)

0 Newtons

d)

1 Newton

2.

To drag a sofa over carpet, movers sometimes use slippery pads. Which force is reduced with the use of the pads?

a)

Friction

b)

Gravity

c)

Push

d)

Magnetism

3.

Why does a newly oiled machine work faster than a machine that hasn't been oiled?

a)

Oil reduces the friction between the parts

b)

Oil increases the friction between the parts

c)

Gravity acts more on an old machine

d)

Gravity acts more on a new machine

4.

What should you do to make a toy car roll faster down a ramp?

a)

Push it with more force

b)

Push it with less force

c)

Remove the force of gravity

d)

Use magnetism to push it down

5.
Who is winning this race?
a)
A
b)
B
6.
Balanced forces can cause
a)
an object to speed up or slow down
b)
an object to stay still or move at a constant speed and direction
7.
What speed is the person with the red line going?
a)
20 km per hour
b)
10 km per hour
c)
50 km per hour
d)
30 km per hour
8.
When was the ostrich going at a constant speed?
a)
Between 0 and 30 min.
b)
Between 45 and 60 min.
c)
Between 30 and 45 min.
9.
this force is ___________ and there will be 
a)
unbalanced, no movement
b)
balanced, movement to the left
c)
balanced, no movement
10.
If all four forces are balanced, the plane will
a)
plummet to the ground
b)
fly faster and faster
c)
fly slower and slower
d)
fly at a constant speed and direction
11.

To calculate speed, you need to know...

a)

distance covered and speed

b)

distance covered and time it took

c)

acceleration and distance

d)

direction and time

12.

Which graph best represents a graph of a car travelling down a motorway at a CONSTANT speed?

a)

A

b)

B

c)

C

d)

D

13.
The net force of the following diagram is
a)
20 N
b)
Moving to the left
c)
Balanced forces
d)
160 N
14.

The snail is travelling at 5 cm/hr. This is an example of

a)

speed

b)

forces

c)

acceleration

d)

mass

15.
The net force of the following diagram is
a)
620N→
b)
To the right→
c)
20N←
d)
balanced↔
16.
What is the speed of the object represented by the graph?
a)
0.5 m/s
b)
2 m/s
c)
5 m/s
d)
4 m/s
17.
A _____ is a pull or a push.
a)
force
b)
friction
c)
gravity
d)
speed
18.
Which has the least friction?
a)
snowboard on a snowy hill
b)
running on the playground
c)
sandpaper on wood
d)
a racer on a track
19.
Why is there less friction between two ice cubes touching than between sandpaper on wood?
a)
They have rough surfaces.
b)
They have loud surfaces.
c)
They have smooth surfaces.
d)
They have bright surfaces.
20.
Why do air planes and race cars have sleek shapes?
a)
to reduce friction from air resistance
b)
to increase air resistance
c)
to look more appealing than cats
d)
so people will buy them
21.
Which runner won the race?
a)
A
b)
B
c)
C
22.

Why does a parachute slow down someone who is falling from the sky?

a)

It applies gravity in the same direction to the fall

b)

It applies air resistance in the opposite direction to the fall

c)

It applies gravity in the opposite direction to the fall

d)

It applies air resistance in the same direction to the fall

23.
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.
24.
How long did it take this object to travel 10 m?
a)
0 s
b)
10 s
c)
15 s
d)
20 s
25.
What does this graph represent?
a)
Constant speed
b)
Acceleration
c)
Not moving
26.
How fast is the object traveling between points B and C?
a)
1 km/hr
b)
0 km/hr
c)
There is no way to tell from this graph
d)
0.9 km/hr
27.

How long did it take Charlie to finish the race?

a)

14 meters

b)

12 seconds

c)

17 seconds

d)

14 seconds

28.

How far did they run?

a)

100 seconds

b)

100 meters

c)

18 meters

d)

18 seconds

29.
What does the flat line mean for Charlie?
a)
He stayed at the same speed
b)
He slowed down
c)
He stopped running 
d)
He stayed at the same speed but at a slower rate
30.
According to the graph how far does the person travel in the first 5 seconds?
a)
2 m
b)
10 m
c)
0 m
d)
5 m
31.
What two types of measurements make up DENSITY? 
a)
Mass and Volume
b)
Temperature and Mass
c)
Grams and Centimeters
d)
Volume and Weight
32.
Why do the liquids form different layers?
a)
They have different densities.  
b)
They have different masses.  
c)
They have different volumes.  
d)
They are different temperatures.  
33.

What units can be used to express density?

a)

g/cm3

b)

grams

c)

millimeters

d)

milliliters

34.

If an object has a density of 3.6 g/cm3 and you put it into water, will it sink or float?

a)

sink

b)

float

35.
Frank has an eraser. It has a mass of 4g, and a volume of 2cm3. What is its density?
a)
8 g/cm3
b)
2 g/cm3
c)
1/2 g/cm3
d)
24 g/cm3
36.
An object should float in a liquid if it is 
a)
Denser than the liquid 
b)
Less dense than the liquid
c)
Lighter than metal
d)
 Shaped like a ball 
37.
Put the liquids in order from most dense to least dense?
a)
4, 3, 2, 1
b)
1, 2, 3, 4
c)
3, 4, 2, 1, 
d)
4, 3, 1, 2
38.
Why do ice cubes float in a  glass of water?
a)
the ice cubes are more dense than the water
b)
the water is more dense than the ice cubes
c)
the water is more dense than the glass
d)
the ice is more dense than the glass
39.
What is the speed of an object that travels 60 meters in 4 seconds?
a)
240 m/s
b)
15 m/s
c)
0.067 m/s
d)
15 mph
40.
The unit for speed is:
a)
m/s
b)
s
c)
m
d)
km
41.

Mr. Stickley drives 50 miles. What does Mr. Stickley need to figure out his speed?

a)

The type of car he drives

b)

His heart rate as he drives

c)

The time he has driven

d)

The direction he was going

42.

Alan travels 100 km in 5hrs. Find his average speed in km/h

a)

5km/hr

b)

10km/hr

c)

50km/hr

d)

20km/hr

43.

What two measurements are necessary for calculating speed?

a)

Mass and time

b)

Temperature and mass

c)

Mass and distance

d)

Distance and time

44.

A spanner is used to tighten a nut. A 7 N force is applied 2 m away from the pivot point. What is the moment applied to the spanner?

a)

14 Nm

b)

3.5 Nm

c)

7 Nm

d)

15 Nm

45.

It's balanced. Calculate force X!

a)

4.0 N

b)

6.0 N

c)

10 N

d)

12 N

46.
What is the moment acting on the seesaw?
a)
1.6Nm
b)
15Nm
c)
16N
d)
4Nm
47.

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

48.

Two people push on a wall with 100 N. The wall doesn’t move. How much work is done?

a)

100J

b)

100N

c)

0J

d)

0N

49.

1. A book weighing 1.0 newton is lifted 2 meters. How much work was done?

a)

2J

b)

0.5J

c)

4J

d)

5J

50.
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
51.
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
52.

Look at the pressure triangle. How do we calculate the area?

a)

force ÷ area

b)

force x pressure

c)

pressure x force

d)

force ÷ pressure

53.

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 Nm2

d)

0.1 Pa

54.
What is the equation used to calculate pressure?
a)
pressure= force/mass
b)
pressure =mass/volume
c)
pressure=area/force
d)
pressure=force/area
55.

What pressure will be exerted on the ground by a 10N box that has equal sides of 1 metre?

a)

1 Nm2

b)

2 Nm2

c)

5 Nm2

d)

10 Nm2

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