IGCSE Physics: Moments
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1.
What is a fulcrum or pivot?
A fulcrum is a pivot point around which a lever
turns.
2.
What two factors determine magnitude Forced applied and distance from the pivot.
of a moment? What is the equation for a Moment = fd
moment?
3.
What is the unit for a moment?
Nm Newton Metres
4.
What directions do moments have?
Clock wise or anticlockwise.
5.
What is a rotational equilibrium.
Where the moments of clockwise and anticlockwise are equal.
6.
What happens when you have unbalance The lever turns around the pivot.
moments?
7.
What is the centre of mass on an object? The point at which the object would balance.
8.
What happens when the centre of mass is The object falls over.
located outside the are of base?
9.
What is the conditions for equilibrium
(a) Net moment is zero (b) Net force is zero
10. What is the moment of a force about the zero, because perpendicular distance =0
point on the line of force
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