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GRADE 7 PHYSICS WEEKEND ASSESSMENT (DREW-PHILIPS TECH-MAGNET ACA

Total questions: 83

Worksheet time: 1hrs 7mins

Name
Class
Date
1.

What is a force?

a)

it is anything which is capable of changing the state of

motion or rest of a body, or deforming it.

b)

It is anything that occupies a space and has mass and volume.

c)

It is a device that is used to measure forces and to weigh bodies.

d)

is a change of position of a body over time with respect to a reference system which is considered fixed.

2.

The unit of force is the Newton

a)

N

b)

n

c)

Nn

3.

Elastic materials are

a)

those that deform when a force is applied.

b)

those that deform but return back to their original shape

c)

those that can be applied forces but go back to the beginning

d)

None is correct.

4.

Friction is the force between two touching things.

a)

True.

b)

False.

5.
What is the force that causes objects to fall to Earth?
a)
Air resistance
b)
Gravity
c)
Water resistance
d)
Pressure
6.
Which of these is NOT a force?
a)
Friction
b)
Air resistance
c)
Water resistance
d)
Electrical resistance
7.
In which direction does gravity act?
a)
Downwards
b)
Upwards
c)
In all directions
d)
Towards the centre of the Earth
8.
What type of force is air resistance?
a)
Contact
b)
Non-contact
9.
When two objects rub together, what force do they produce
a)
Gravity
b)
Air resistance
c)
Friction
d)
Water resistance
10.

Is this an example of a balanced or unbalanced force?

a)

Balanced force

b)

Unbalanced force

c)

I don't know

11.

What is a force?

a)

it is anything which is capable of changing the state of

motion or rest of a body, or deforming it.

b)

It is anything that occupies a space and has mass and volume.

c)

It is a device that is used to measure forces and to weigh bodies.

d)

is a change of position of a body over time with respect to a reference system which is considered fixed.

12.

The unit of force is the Newton

a)

N

b)

n

c)

Nn

13.

Elastic materials are

a)

those that deform when a force is applied.

b)

those that deform but return back to their original shape

c)

those that can be applied forces but go back to the beginning

d)

None is correct.

14.

Plastic materials are

a)

those that deform with a form but do not return back to their original shape.

b)

those that deform with a form and return back to their original shape.

c)

None is correct.

d)

A non-eco-friendly material

15.

It two forces are the same size, something will happen. The forces are unbalanced.

a)

True.

b)

False.

16.

Friction is the force between two touching things.

a)

True.

b)

False.

17.
What is the force that causes objects to fall to Earth?
a)
Air resistance
b)
Gravity
c)
Water resistance
d)
Pressure
18.
Which of these is NOT a force?
a)
Friction
b)
Air resistance
c)
Water resistance
d)
Electrical resistance
19.
In which direction does gravity act?
a)
Downwards
b)
Upwards
c)
In all directions
d)
Towards the centre of the Earth
20.
What force does a parachute use to slow things down before hitting the ground?
a)
Friction
b)
Air resistance
c)
Water resistance
d)
Wind
21.
What type of force is air resistance?
a)
Contact
b)
Non-contact
22.
When two objects rub together, what force do they produce
a)
Gravity
b)
Air resistance
c)
Friction
d)
Water resistance
23.
What force does an aeroplane have to try to overcome so it is not slowed down too much?
a)
Gravity
b)
Air resistance
c)
Water resistance
d)
Friction
24.
Which of these uses friction?
a)
A parachute
b)
A ball falling through the sky
c)
Brakes on a bike
d)
A wind turbine
25.
What affect does water resistance have on a boat?
a)
Just slows it down
b)
Slows it down AND helps it keep afloat
c)
Makes it sink
d)
Just makes it float
26.

Is this an example of a balanced or unbalanced force?

a)

Balanced force

b)

Unbalanced force

c)

I don't know

27.

In this force diagram, which arrow is representing Friction?

a)

A

b)

B

c)

C

d)

D

28.

How do you know if this object is balanced?

a)

It's not balanced; it's Net Force is 14 N

b)

It is balanced because its Net Force is 0 N.

c)

It's not balanced; it's Net Force is 10 N left and 4 N up.

d)

I don't know how to tell.

29.

According to this force diagram, is this object balanced or unbalanced?

a)

Balanced

b)

Unbalanced

c)

I don't know

30.

What is the net force on this object?

a)

80 N West

b)

80 N East

c)

40 N West

d)

40 N East

31.

What is the net force?

a)

3 N

b)

3 N, right

c)

17 N, right

d)

3 N, left

32.

What is the Net Force on this object?

a)

11 N, right

b)

8 N, right

c)

3 N, left

d)

5 N, right

33.
Which one is balanced?
a)
top
b)
bottom
c)
both
34.

Who discovered Hooke's law?

a)

Robert Hooke

b)

Charlie

c)

Newton

35.

If the original length of a spring is 20m and its extended length is 30m. What is the extension?

a)

20m

b)

12m

c)

75m

d)

45m

e)

10m

36.
Hooke's Law fails when a material reaches its:
a)
breakdown
b)
elastic limit
c)
end of tether
d)
fracture stress
37.
A graph of extension against force for an elastic material is:
a)
A downward curve
b)
An upward curve
c)
A straight line from any point on the x and y axis
d)
A straight line from the origin
38.
If extension = Stretched length - original length. What is the extension of spring D.
a)
1mm
b)
2mm
c)
3mm
d)
0mm
39.

Which force does NOT act against the movement of this skier?

a)

drag

b)

air resistance

c)

thrust

d)

friction

40.

Which force is keeping this swimmer floating in the water?

a)

water resistance

b)

thrust

c)

upthrust

d)

weight

41.

What units are forces measured in?

a)

Joules

b)

Amps

c)

Newtons

d)

Degrees Celsius

42.

On Earth, 1kg causes a weight of approximately 10N. What would the boy's weight be?

a)

50N

b)

5N

c)

250N

d)

500N

43.

This astronaut is on the moon so his...

a)

mass and weight would be different to on Earth

b)

mass and weight would be the same as on Earth

c)

weight would increase but his mass stay the same

d)

weight would decrease but his mass would stay the same

44.

On which planet would an object weigh the least?

a)

Jupiter

b)

Mars

c)

Mercury

d)

Saturn

45.

Which surface is likely to have caused the least friction?

a)

smooth top table

b)

bumpy floor tiles

c)

woolly carpet

46.

For this investigation what is the independent variable?

a)

The distance the car has travelled

b)

The surface after the ramp

c)

The height of the ramp

47.

Which of these would be a control variable for this investigation?

a)

The distance travelled by the car

b)

The size and shape of the car

c)

The surface used

48.

The students are carrying out an investigation into friction. If they add more masses to the wooden block, how will this affect the force needed to pull the block along?

a)

The force will stay the same

b)

The force needed will decrease

c)

The force needed will increase

49.

If 1kg = approximately 10N, then what is the weight of the block on the electronic balance?

a)

4738 N

b)

4.738 N

c)

47.38 N

50.

Look at the picture. The weight causes the spring to extend and move downward. A forces acts in the opposite direction, pulling the spring back together. What is the name of this force?

a)

upthrust

b)

lift

c)

tension

d)

potential

51.

The boat is floating. Which of these is not correct?

a)

A and B are balanced

b)

force A is larger than B

c)

A and B are equal

d)

A and B are in opposite directions

52.

Which force will cause the roller coaster car to move at B?

a)

air resistance

b)

friction

c)

weight

53.

If there is no movement, what force must team B be pulling with?

a)

200 N

b)

600 N

c)

300 N

54.

Which of these has to be true for the car to accelerate?

a)

Reaction from the road and force A are equal

b)

Force B is equal to the push of the engine

c)

The push of the engine is greater than force B

55.

If force B = 600N, force A = 300 N and force C = 400N, what will happen?

a)

The astronaut will move up

b)

The astronaut will move to the left

c)

The astronaut will to the right

d)

The astronaut will move down

56.

If force B = 600N, force A = 300 N and force C = 400N. What will the resultant force be for the direction of movement?

a)

1200 N

b)

700 N

c)

400 N

d)

100 N

57.

The skier is moving down the slope at a constant speed. Which is true?

a)

Thrust and friction are balanced

b)

Thrust is greater than friction

c)

Friction is greater than thrust

58.

What is the weight of the stone (even if you cannot see perfectly you can select the correct answer without any problem)

a)

600 N

b)

6.5 N

c)

0.65 N

d)

0.0065 N

59.

The skier is crouching down and pulling his body together so...

a)

he can lower his weight

b)

he can increase drag

c)

he can decrease air resistance

60.

This ski diver is falling through the air at a constant speed. This means...

a)

His weight and air resistance must be balanced

b)

His weight must be greater than air resistance

c)

His weight and air resistance are unbalanced

61.

Imagine this airplane is rising up in the air. Which is therefore correct...

a)

weight must be the same as lift

b)

Lift and weight are balanced

c)

Lift must be greater than weight

62.

The weight of the bucket B = 11 N. The man pulls up (force A) with a force of 20 N. What will the net or resultant force be and in what direction will it be?

a)

9 N down

b)

9 N up

c)

31 N up

d)

8 N down

63.

The boy is going to put different surfaces over the ramp and see how long it takes for the car to roll/move down to the bottom. Which of these will not be a control variable?

a)

Height of the ramp

b)

length of the ramp

c)

Surface added to the ramp

d)

Weight of the toy car

64.

What type of force is this man using to push his grocery cart?

a)

Normal Force

b)

Gravity

c)

Air Resistance

d)

Applied Force

65.

What is the net force?

a)

3 N

b)

3 N, right

c)

17 N, right

d)

3 N, left

66.
Who wins the tug of war with what net force?
a)
The person on the left with 20 N
b)
The person on the left with 80 N
c)
The people on the right with 20 N
d)
The people on the right with 100 N
67.
What is the net force?
a)
20 N 
b)
0 N 
c)
400 N 
d)
40 N 
68.

What is the unit to MEASURE force?

a)

Kilogram

b)

Meter

c)

Pounds

d)

Newton

69.

A ____________ is a push or a pull on an object.

a)

friction

b)

force

c)

magnet

d)

gravity

70.
If these teams 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.
71.
Balanced or unbalanced?
a)
balanced
b)
unbalanced
72.

Forces that have a net force of zero Newtons

a)

Balanced force

b)

Unbalanced force

73.
The sum of all forces acting on an object.
a)
Contact Force
b)
Balanced Force
c)
Unbalanced Force
d)
Net Force
74.
What will cause an object to move?
a)
Applied forces
b)
Balanced forces
c)
Unbalanced forces
75.
Calculate the Net Force. 
a)
60N, Left 
b)
40N, Right 
c)
0N
d)
60N, Right
76.
What is a Force?
a)
The distance
b)
Mass
c)
A push or pull
d)
Give me a  failing grade 
77.
What force holds the planets in motion around the sun?
a)
Magnetic
b)
Electrical
c)
Gravitational
d)
Air Resistance
78.
What does the strength of gravity between two objects depend upon?
a)
Mass & distance
b)
Mass & weight
c)
Gravity & inertia
d)
Inertia & mass
79.
All objects in the universe have a gravitational attraction to each other. 
a)
True
b)
False
80.
Jupiter has about 317 times more mass than Earth. What can you infer from this fact? 
a)
That Jupiter’s gravitational force is much weaker than on Earth’s gravitational force.
b)
That Jupiter’s gravitational force is much stronger than Earth’s gravitational force.
c)
That Jupiter’s and Earth’s gravitational forces are equal.
d)
Mass has no effect on the gravitational force between two objects
81.
This type of force resist motion between two surfaces that are pressed together
a)
contact
b)
gravity
c)
friction
82.

If both forces are going in the same direction you should______ those forces

a)

Add

b)

Subtract

c)

Divide

d)

Multiply

83.

When forces are going in the opposite direction of each other you should do what do find the net force

a)

Subtract

b)

Add

c)

Divide

d)

Multiply

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