10 applications of moments
Answers
Answer:
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Explanation:
If a body is in rotational equilibrium then the sum of the anticlockwise moments is equal to the sum of the clockwise moments. OR If a body is in rotational equilibrium then the algebraic sum of the moments about any point is zero. Applications of Principle of Moments: To find the mass of an object.
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Answer:
Explanation:
A person pushing a swing will make the swing rotate about its pivot.
A worker applies a force to a spanner to rotate a nut.
A person removes a bottle’s cork by pushing down the bottle opener’s lever.
A force is applied to a door knob and the door swings open about its hinge.
A driver can turn a steering wheel by applying a force on its rim.
A moment is the turning effect of a force around a fixed point called a pivot. For example, this could be a door opening around a fixed hinge or a spanner turning around a fixed nut.
The size of a moment depends on two factors:
the size of the force applied
the perpendicular distance from the pivot to the line of action of the force
This explains why less force is needed to open a door by pushing at the side furthest from the hinge than at the side closest to the hinge. To push at the hinge side of the door requires more force to be exerted because the distance is smaller.
A moment can be calculated using this equation:
M = F × d
An equation triangle showing moments: M over F and d
where:
M = the moment of the force in newton-metres, Nm
F = the force in newtons, N
d = the perpendicular distance from the line of action of the force to the pivot in metres, m