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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
An effort is applied on the bigger wheel of a gear having 32 teeth. It is used to turn a wheel of 8 teeth. Where it is used.
In a door, handle is provided ......... from the hinges.
State two effects of a force when applied on a body.
State one way to decrease the moment of a given force about a given axis of rotation.
The steering wheel of a vehicle is of large diameter.
State one factor on which the magnitude of a non-contact force depends. How does it depend on the factor stated by you?.
A wheel of diameter 3 m is shown in fig. 2 with axle at 0. A force F = 8 N is applied at Q in the direction shown in figure. Calculate the moment of force about:
(i) centre o, and
(ii) point p.
(i) What do you understand by the term couple of forces?
(ii) Calculate the moment of a couple shown in fig.
Fig. shows a uniform meter scale weighing 100 N pivoted at its centre. Two weights of 500 N and 300 N are hung from the ruler as shown in fig.
(i) Calculate total clockwise and anticlockwise moments.
(ii) Calculate difference in clockwise moment and anticlockwise moment.
(iii) Calculate the distance from O where a 100 N weight should be suspended to balance the meter scale.
Write the expression for the moment of force about a given axis.
