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- 1. Multiple Choice
What is the unit of force?
Meter
Centimeter
Newton
- 2. Multiple Choice
Moment of force is smaller when applied force is smaller.
TRUE
FALSE
- 3. Multiple ChoiceMoment is a quantity that tells turning effect of a force about turning point.TRUEFALSE
- 4. Multiple Choice
What is the unit of moment f force?
N
m
Nm
N/m
- 5. Multiple Choice
What condition must be met if an object is to be in equilibrium?
force on it must be balanced
force on it mus be unbalanced
resultant force more than 10 N
resultant turning effect more than 10
- 6. Multiple Choice
What is the moment acting on the seesaw?1.6Nm15Nm16N4Nm - 7. Multiple ChoiceWhat is the anticlockwise moment acting on this crane?80,000Nm100,000Nm120,000Nm140,000Nm
- 8. Multiple ChoiceWhat is the moment produced by the 15 N?15 Nm (clockwise)150 Nm (anti - clockwise)1.5 Nm (anti - clockwise)0.15 Nm (clockwise)
- 9. Multiple ChoiceA seesaw is unbalanced with two people of different masses sitting equal distances from the center. Which of the following will result in equilibrium?The larger person moving further away from the center.Moving the smaller person closer to the center.Moving the smaller person further from the center.Making the larger person do nothing.
- 10. Multiple ChoiceThe easiest way to open a heavy door is by applying the forceNear the hingesIn the middle of the doorAt the edge of the door far from the hingesAt the top of the door
- 11. Multiple ChoiceA 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?7.5 Nm1.5 Nm750 Nm150 Nm
- 12. Multiple Choice
Assuming the system is in equilibrium, calculate the missing distance d
3.4 m
2.8 m
4.4 m
1.6 m
- 13. Multiple ChoiceMoment is bigger if the force acts further from turning pointTRUEFALSE
- 14. Multiple Choice
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
B
C
D
- 15. Multiple Choice
Which one will loosened a nut more easily?
a short spanner because a larger turning effect can be produced.
a long spanner because a larger turning effect can be produced.
a long spanner because a larger force can be produced.
a short spanner because a larger force can be produced.
- 16. Multiple Choice
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
B
C
D
- 17. Multiple ChoiceWhat happens when two forces act in the same direction?They cancel each other out.The stronger one prevails.Their strengths are added.Their sum divided by the two is the total force.
- 18. Multiple Choice
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?
450 N
350 N
4.5 N
200 N
- 19. Multiple ChoiceWhat is the moment acting on the seesaw?1.6Nm15Nm16N4Nm
- 20. Multiple ChoiceWhat is the correct equation for calculating a perpendicular distance?perpendicular distance = force x momentperpendicular distance = force / momentperpendicular distance = moment / force
- 21. Multiple Choice
Calculate the unknown force X!
4.0 N
6.0 N
10 N
12 N
- 22. Multiple Choice
At what distance should a 2N load placed from the pivot so that the see saw won't move?
0.2m
0.5m
0.45m
0.42m
- 23. Multiple ChoiceWhat is the correct equation for calculating a force?force = perpendicular distance x momentforce = moment / perpendicular distanceforce = perpendicular distance / moment
- 24. Multiple Choice
The moment of force defined as the product of....
the force and the acceleration
the force and the perpendicular distance
the force and the velocity
the force and the perpendicular distance from pivot
- 25. Multiple Choice
State the principle of moments.
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.
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.
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.
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.
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