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प्रश्न
Select the correct alternative.
Friction
विकल्प
promotes motion
opposes motion
acts in the direction of motion
is always a nuisance
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उत्तर
opposes motion
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संबंधित प्रश्न
Write true or false.
A force can change the direction of motion of a moving body.
What effect can a force produce on a body which is not allowed to move?
Give one example of stops motion to indicate that the application of a force?
Name the type of force which act in the following case:
A horse moves a cart
Answer the following in a word or two or in a sentence.
Which force is responsible for supporting the weight of a book placed on a table?
Solve the following numerical problem.
Two persons are pushing a car with a force of 30 N and 70 N in opposite directions. Calculate the resultant force and its direction.
Give a reason for the following.
Boats and ships have streamlined shapes?
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.
Two objects repel each other. This repulsion could be due to
Two women are of the same weight. One wears sandals with pointed heels while the other wears sandals with flat soles. Which one would feel more comfortable while walking on a sandy beach? Give reasons for your answer.
