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प्रश्न
Give an example for each of the following uses of a machine:
to change the point of application of force
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उत्तर
A lever is used to change the point of application of force.
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संबंधित प्रश्न
State the effect of force F in of the following diagram.
In Fig. a force F is applied in a direction passing through the pivoted point O of the body. Will the body rotate? Give reason to support your answer.
Is moment of force a scalar or a vector?
Classify the following amongst contact and non-contact forces.
Frictional force
Give an example of the following uses of a machine:
to change the direction of force
(i) What do you understand by the term couple of forces?
(ii) Calculate the moment of a couple shown in fig.
How does the distance of separation between two bodies affect the magnitude of the non-contact force between them?
State when the moment of force is positive and when it is negative.
A uniform metre rule rests horizontally on a knife-edge at the 60 cm mark when a mass of 10 gram is suspended from one end. At which end must this mass be suspended? What is the mass of the rule?
A nut is opened by a wrench of length 25 cm. If the least force required is 10 N, find the moment of force needed to turn the nut.
