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प्रश्न
State if the following statement is true or false. Correct the statement if it is false.
Friction wears down the parts of machi
विकल्प
True
False
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उत्तर
True
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संबंधित प्रश्न
Fill in the blank.
Friction ....................... the motion.
Fill in the blank.
Lubricants are used to ..................... friction.
Name the type of force which act in the following case:
A stone falls from a roof
Name the type of force which act in the following case:
A man rows a boat.
Answer the following.
Define weight.
Answer the following in a word or two or in a sentence.
Give an example in which a force can change the direction of an object.
Solve the following numerical problem.
Two force of 12 N and 25 N act on a body to the left-hand side, while another force of 35 N acts on it to the right-hand side. Find the resultant of the forces.
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.
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.
Mention the factors on that the effect of a force depends.
