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Forces, moments, and pressure

Total questions: 69

Worksheet time: 52mins

Name
Class
Date
1.

If an object's surface area is smaller does it create more or less pressure?

a)

More

b)

Less

c)

The same

2.

What is pressure?

a)

The amount of force exerted on a surface

b)

The surface area of an object

c)

The weight of an object

3.

If an object's surface area is smaller does it create more or less pressure?

a)

More

b)

Less

c)

The same

4.

What is pressure?

a)

The amount of force exerted on a surface

b)

The surface area of an object

c)

The weight of an object

5.

If you're walking in snow why would you wear boots instead of high heels?

a)

Because boots have a higher surface area making the pressure less and stopping you from sinking.

b)

Because it's more comfortable

c)

No, high heels are better

6.
What is the equation used to calculate pressure?
a)
pressure= force/mass
b)
pressure =mass/volume
c)
pressure=area/force
d)
pressure=force/area
7.
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
8.
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
9.
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
10.

A cardboard box weighs 30N. If we added weight to the box, what would happen to the pressure?

a)

increase

b)

decrease

c)

stay the same

11.

Which situation produces more force on the floor?

a)

standing on one foot

b)

standing on two feet

c)

standing on four feet

d)

all produce the same force

12.

Which situation produces more pressure on the floor?

a)

standing on one foot

b)

standing on two feet

c)

standing on four feet

d)

all produce the same pressure

13.

A person weighs 700N and their feet have a surface area of 0.1m2. How much pressure is exerted?

a)

7000N/m2

b)

70N/cm2

c)

100N/m2

14.

If you're walking in snow why would you wear boots instead of high heels?

a)

Because boots have a higher surface area making the pressure less and stopping you from sinking.

b)

Because it's more comfortable

c)

No, high heels are better

15.

What does N/m2 mean?

a)

Newtons per squared metre

b)

Kilograms per squared mile

c)

Squared metres per newton

16.
Where is pressure the greatest on the dam?
a)
D
b)
C
c)
B
d)
A
17.
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
18.
Pressure is measured in what units
a)
Newtons
b)
m/s
c)
Pascals
d)
Moles
19.
Pressure can be measured in Pascales (Pa) or Newtons per square metre.
1 Pa = 1N/m2
a)
True
b)
False
20.
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
21.

To increase pressure we can...

a)

Increasing force

b)

decreasing force

c)

increasing area

d)

decreasing area

22.

A cardboard box weighs 30N. If we added weight to the box, what would happen to the pressure?

a)

increase

b)

decrease

c)

stay the same

23.

A knife will exert more pressure than heels

a)

True

b)

False

24.

To increase pressure, we should

a)

Increase area, decrease force

b)

Decrease area and increase force

c)

Keep the area and force the same

25.

Skis are used to __________________ on the snow.

a)

increase pressure

b)

decrease pressure

26.
A student uses a glue stick with an area of 4 cm2, putting a pressure of 0.5 N/cm2 on her book. Calculate the force she puts on the glue stick.
a)
1N
b)
2N
c)
20N
d)
15N
27.
A force of 20 N acts over an area of 4m2. Calculate the pressure
a)
80 Pa
b)
5 Pa
c)
80 N
d)
5 N
28.
What is the anticlockwise moment acting on this crane?
a)
80,000Nm
b)
100,000Nm
c)
120,000Nm
d)
140,000Nm
29.
Unit of force.
a)
Meter
b)
Centimeter
c)
Newton
30.
What is the moment acting on the seesaw?
a)
1.6Nm
b)
15Nm
c)
16N
d)
4Nm
31.
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)
32.
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.
33.
The easiest way to open a heavy door  is by applying the force
a)
Near the hinges
b)
In the middle of the door
c)
At the edge of the door far from the hinges
d)
At the top of the door
34.

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

35.
A wrench is used to tighten a nut. A 15N perpendicular force is applied 50cm away from the axis of rotation, and moves a distance of 10 cm as it turns. What is the torque applied to the wrench?
a)
7.5 Nm
b)
1.5 Nm
c)
750 Nm
d)
150 Nm
36.

Assuming the system is in equilibrium, calculate the missing distance d

a)

3.4 m

b)

2.8 m

c)

4.4 m

d)

1.6 m

37.

The diagram shows a beam. Without any weights, the beam balances at its centre.

Three weights are hung as shown.

At which point does a load of 2 N balance the beam?

a)

A

b)

B

c)

C

d)

D

38.

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.

39.

The figure below shows a man lifting a heavy rock using a steel bar. He pushes downwards on the end of the bar with a force F.


Which pivot positions allows the force F to be as small as possible?

a)

A

b)

B

c)

C

d)

D

40.

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

41.

The moment of a force causes an object to

a)

move forward

b)

move backward

c)

stop moving

d)

turn about a fixed point

42.

Moment can be calculated using the equation:

a)

M = F × d

b)

M = F / d

c)

M = F2 × d

d)

M = F / d2

43.

The SI unit of moment of force is –

a)

m

b)

N

c)

kgf

d)

Nm

44.

When an object is in equilibrium, which equation is true?

a)

Clockwise moment = anticlockwise moment

b)

Clockwise moment + anticlockwise moment = 0

c)

Clockwise moment / anticlockwise moment = 0

d)

Clockwise moment + anticlockwise moment = resultant force

45.

What is the size of the moment shown by the black arrow?

a)

30 Nm

b)

36 Nm

c)

40 Nm

d)

60 Nm

46.

A car braking is an exmaple of what type of force?

a)

Gravity

b)

Air Resistance

c)

Friction

47.

What is the name of the force that pulls you to the earth?

a)

Gravity

b)

Air Resistance

c)

Friction

48.

Rubbing a balloon on your head causes charge to build up on the balloon The balloon can then "stick" to the wall - what force is acting here?

a)

Gravity

b)

Electrostatic

c)

Friction

d)

Applied

49.

What is the name of the force responsible for keeping a book on the desk?

a)

Gravity

b)

Air Resistance

c)

Normal Force

d)

Friction

50.
What is a force?
a)
the PUSH or PULL on an object 
b)
The MOTION an object creates
c)
The objects HITTING one another
d)
Going REALLY FAST
51.
What is the net force?
a)
17 N Right
b)
3 N Right
c)
3 N Left
d)
17 N Left
52.
What is the unit for FORCE? 
a)
N (Newtons)
b)
lbs (pounds)
c)
g (grams)
d)
m/s (meters per second)
53.
Which one is balanced?
a)
top
b)
bottom
c)
both
54.
Is it BALANCED? 
a)
Yes
b)
No
55.
This is an example of what kind of force?
a)
Balanced Force
b)
Pushing Force
c)
Gravity Force
d)
Unbalanced Force
56.
Which direction will the object move?
a)
Up
b)
Down
c)
Right
d)
Left
57.
If the net force is 0 the object will ... 
a)
CHANGES motion
b)
STAY the SAME, NOT Move
58.

If the boy is pulling with a force of 10 N and the girl is pushing with a force 20 N, what is the net force on the box?

a)

10 N

b)

20 N

c)

30 N

d)

0 N

59.
What type of force is shown in the picture?
a)
The Cat force
b)
Star Wars Force
c)
Unbalanced force
d)
Balanced  force
60.
What is a Force?
a)
The distance
b)
Mass
c)
A push or pull
d)
Give me a  failing grade 
61.
An _______ force must act on an object for it to CHANGE it's motion
a)
balanced
b)
unbalanced
c)
gravitational
d)
electrical
62.

If the net force is equal to zero, the forces acting on the object are

a)

balanced

b)

unbalanced

63.
The unit of force is
a)
m/s
b)
m/s^2
c)
newton
d)
kg
64.
Forces that have a net force of zero ( the object is still).
a)
Balanced force
b)
Unbalanced force
65.
What is the net force?
a)
5000 N right
b)
4000 N right
c)
40 N left
d)
4000 N left
66.
What is the net force in this picture?
a)
50 Newtons to the right
b)
950 Newtons to the right
c)
950 Newtons to the left
d)
50 Newtons to the left
67.
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
68.

Two forces act on an object to the right at the same time. What force is required to bring the object into equilibrium?

a)

9 N to the right

b)

9 N to the left

c)

3 N to the left

d)

18 N to the left

69.
When objects remain in the same place, it is called...
a)
gravity
b)
friction
c)
balanced force
d)
unbalanced force

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