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प्रश्न
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उत्तर
The turning effect produced by a force on a rigid body about a point, pivot or fulcrum is called the moment of force or torque. It is measured by the product of force and the perpendicular distance of the pivot from the line of action of the force.
Moment of a force = Force × perpendicular distance of the pivot from the force.
Its SI unit is newton-metre (Nm).
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संबंधित प्रश्न
Name the factors affecting the turning effect of a body
Find the moment of force of 20 N about an axis of rotation at distance 0.5 m from the force.
State the condition when the change in the momentum of a body depends only on the change in its velocity.
State Newton's Second law of motion. Under what conditon does it take the form F = ma?
What do you understand by the clockwise and anticlockwise moment of force? When is it taken positive?
A, B and C are the three forces each of magnitude 4 N acting in the plane of the paper as shown in Figure. The point O lies in the same plane.
- Which force has the least moment about O? Give a reason.
- Which force has the greatest moment about O? Give a reason.
- Name the forces producing
(a) Clockwise
(b) anticlockwise moments. - What is the resultant torque about the point O?
Define couple.
A meter scale is provided at 10 cm mark and is balanced by suspending 400 g from 0 cm mark (fig.). Calculate the mass of meter scale.
Define non-contact forces.
State the units of moment of force.
