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प्रश्न
What do you understand by the term friction?
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उत्तर
Friction is that force that opposes the relative motion between the two surfaces that are in contact with each other.
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संबंधित प्रश्न
Write true or false.
The frictional force acts in the direction of motion of body
Write true or false.
A force increases the mass of the body when applied on it.
What effect can a force produce on a body which is not allowed to move?
Give one example of slows down motion to indicate that the application of a force?
Name the type of force which act in the following case:
A boy opens the door
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Boats and ships have streamlined shapes?
Answer the following in detail.
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Two balls of the same size but of different materials, rubber and iron are kept on the smooth floor of a moving train. The brakes are applied suddenly to stop the train. Will the balls start rolling? If so, in which direction? Will they move at the same speed? Give reasons for your answer.
What is momentum? Write its SI unit. Interpret force in terms of momentum. Represent the following graphically
(a) momentum versus velocity when mass is fixed.
(b) momentum versus mass when velocity is constant.
