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- 1. Multiple Choice
What is the anticlockwise moment acting on this crane?80,000Nm100,000Nm120,000Nm140,000Nm - 2. Multiple Choice
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?
0.42 m
2.4 m
4.8 m
4.2 m
- 3. 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)
- 4. 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
- 5. Multiple Choice
What is the unit of moment f force?
N
m
Nm
N/m
- 6. 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.
- 7. 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
- 8. 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
- 9. Multiple Choice
A beam lies on a pivot. If F1 = F2 the beam will..
turn clockwise
turn anti-clockwise
not turn
- 10. Multiple ChoiceWhat is the correct equation for calculating a perpendicular distance?perpendicular distance = force x momentperpendicular distance = force / momentperpendicular distance = moment / force
- Answer choicesTagsAnswer choicesTags