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Physics_Moment

Total questions: 52

Worksheet time: 1hrs 4mins

Name
Class
Date
1.
What is the anticlockwise moment acting on this crane?
a)
80,000Nm
b)
100,000Nm
c)
120,000Nm
d)
140,000Nm
2.
What is the moment acting on the seesaw?
a)
1.6Nm
b)
15Nm
c)
16N
d)
4Nm
3.
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.
4.

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

5.
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)
6.
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
7.
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
8.

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

9.

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

10.

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.

11.

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

12.

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

13.

What is the unit of moment f force?

a)

N

b)

m

c)

Nm

d)

N/m

14.
Moment is a quantity that tells turning effect of a force about turning point. 
a)
TRUE
b)
FALSE
15.

What condition must be met if an object is to be in equilibrium?

a)

force on it must be balanced

b)

force on it mus be unbalanced

c)

resultant force more than 10 N

d)

resultant turning effect more than 10

16.
What happens when two forces act in the same direction?
a)
They cancel each other out.
b)
The stronger one prevails.
c)
Their strengths are added.
d)
Their sum divided by the two is the total force.
17.
What is the correct equation for calculating a perpendicular distance? 
a)
perpendicular distance = force x moment 
b)
perpendicular distance = force / moment 
c)
perpendicular distance = moment / force
18.

Calculate the unknown force X!

a)

4.0 N

b)

6.0 N

c)

10 N

d)

12 N

19.

At what distance should a 2N load placed from the pivot so that the see saw won't move?

a)

0.2m

b)

0.5m

c)

0.45m

d)

0.42m

20.

State the principle of moments.

a)

When a system is in equilibrium, the sum of the total clockwise moment is equal to the sum of the total anti-clockwise moment about the same pivot.

b)

When a system is in equilibrium, the sum of the total clockwise moment is greater the sum of the total anti-clockwise moment about the same pivot.

c)

When a system is in equilibrium, the sum of the total clockwise moment is less than the sum of the total anti-clockwise moment about the same pivot.

d)

When a system is in equilibrium, the sum of the total clockwise moment is equal to the sum of the total anti-clockwise moment about the different pivot.

21.

There are two types of moments which are clockwise and anticlockwise moments

a)

True

b)

False

22.

What is unit for Moments

a)

nm

b)

NM

c)

Nm

d)

Nm2

23.

What is Moments?

a)

Turning effects of force

b)

Force x perpendicular distance

c)

Clockwise moments

d)

Force x displacement

24.

Find moment at A

a)

24 kNm

b)

240000 Nm

c)

16 kNm

d)

29000 Nm

25.

Find moment at C

(a)  

26.

Find moment at E.

(a)  

27.

Find moment at C.

(a)  

28.

Momen daya bergantung kepada DUA faktor iaitu

The moment of force depends on TWO factors, namely

a)

daya yang dikenakan

the force applied

b)

jarak tegak fulkrum dan daya

perpendicular distance of the fulcrum to the force

c)

kuasa di fulkrum dan daya

power in the fulcrum and force

d)

masa dari fulkrum dan daya

time from fulcrum and force

29.

Apakah unit bagi momen daya?

What is the unit of moment f force?

a)

N

b)

m

c)

Nm

d)

N/cm

30.

Yang manakah akan melonggarkan nat dengan lebih mudah?

Which one will loosen a nut more easily?

a)

sepana pendek kerana kesan putaran yang lebih kuat akan dihasilkan.

a short spanner because a larger moment of force can be produced.

b)

spanar panjang kerana momen yang lebih besar akan dihasilkan.

a long spanner because a larger moment of force can be produced.

c)

spanar panjang kerana daya yang lebih kuat akan dikenakan.

a long spanner because a larger force will be applied..

d)

spanar pendek kerana daya yang lebih besar akan dikenakan.

a short spanner because a larger force will be produced.

31.
1. A _________is a simple machine with a fulcrum and a rigid bar.
a)
Pivot
b)
Lever
c)
Wedge
32.
What is the anticlockwise moment acting on this crane?
a)
80,000Nm
b)
100,000Nm
c)
120,000Nm
d)
140,000Nm
33.
What is the moment acting on the seesaw?
a)
1.6Nm
b)
15Nm
c)
16N
d)
4Nm
34.
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.
35.
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
36.

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.

37.

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

38.

What to we call forces applied to anything that turns?

a)

Minute

b)

Moment

c)

Minimum

d)

Monument

39.

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

a)

30 Nm

b)

36 Nm

c)

40 Nm

d)

60 Nm

40.

What is the unit of force?

a)

Meter

b)

Newton

c)

Newton meter

d)

Centimeter

41.

Moment is a measure of the turning effect of a force.

a)

True

b)

False

42.

Principle of moments states that an object is balanced when clockwise moments are equal to anticlockwise moments.

a)

True

b)

False

43.

The greater the force, the greater its turning effect.

a)

True

b)

False

44.

Moment = force / distance from pivot

a)

True

b)

False

45.

The further the force is from the pivot, the greater its turning effect.

a)

True

b)

False

46.

What is the moment acting on the left side of the pivot?

a)

2 Nm

b)

20 Nm

c)

200 Nm

d)

0.2 Nm

47.

The beam is balanced.

a)

True

b)

False

48.

A force of 4 N acts on a lever 2 m from the pivot. What is the moment?

a)

8 Nm

b)

6 Nm

c)

2 Nm

d)

3 Nm

49.

One way to increase the turning force on a spanner is to:

a)

Use a shorter spanner

b)

Use a longer pivot

c)

Use a longer spanner

50.

A cat weighing 50 N is 1 m from the pivot. How far away does a mouse weighing 0.5 N have to be to balance the beam?

a)

1 m

b)

10 m

c)

100 m

d)

1000 m

51.
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.
52.

A cat weighing 50 N is 1 m from the pivot. How far away does a mouse weighing 0.5 N have to be to balance the beam?

a)

1 m

b)

10 m

c)

100 m

d)

1000 m

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