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WorksheetsMoments
Total questions: 13
Worksheet time: 12mins
The moment of a force causes an object to
move forward
move backward
stop moving
turn about a fixed point
Moment can be calculated using the equation:
M = F × d
M = F / d
M = F2 × d
M = F / d2
The SI unit of moment of force is –
m
N
kgf
Nm
When an object is in equilibrium, which equation is true?
Clockwise moment = anticlockwise moment
Clockwise moment + anticlockwise moment = 0
Clockwise moment / anticlockwise moment = 0
Clockwise moment + anticlockwise moment = resultant force
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
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
What do we call forces applied to anything that turns?
Minute
Moment
Minimum
Monument
What is the size of the moment shown by the black arrow?
30 Nm
36 Nm
40 Nm
60 Nm
Moment (Nm) =
Force (N) x distance (m)
Angular Force (N°) x distance (m)
Work done (J)
Force (N) x distance (s)
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.
Find the Force
Force = 6N
Force = 10N
Force = 16N
Force = 20N
