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WorksheetsMoments
Total questions: 11
Worksheet time: 17mins
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.
What is the moment acting on the seesaw?
1.6Nm
15Nm
16N
4Nm
What is the size of the moment shown by the black arrow?
30 Nm
36 Nm
40 Nm
60 Nm
A beam lies on a pivot. If d2 > d1 and F1 = F2, which direction will the beam turn?
turn clockwise
turn anti-clockwise
not turn
True or False: The magnitude of the moment decreases as the force acts further from the pivot point. M=d×F⊥
TRUE
FALSE
What is the unit of moment of force?
N
m
Nm
N/m
A wrench is used to tighten a nut. A 7 N perpendicular force is applied 2 m away from the axis of rotation. What is the torque applied to the wrench?
14 Nm
3.5 Nm
7 Nm
15 Nm
A nut can be loosened more easily with
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.
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
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
