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प्रश्न
Tick the most appropriate answer
Friction always
विकल्प
supports motion
starts motion
encourages motion
opposes motion
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उत्तर
opposes motion
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संबंधित प्रश्न
Sometimes, a crackling sound is heard while taking off a sweater during winters. Explain.
Define static friction
Define rolling friction
Fill in the blank.
Sliding friction and rolling friction are types of .................. friction.
Fill in the blank.
Bicycles use ...................... to reduce friction between the pedals and the crank
Answer the following in short.
How can sliding friction be changed into rolling friction easily?
How do you feel when you touch a nail immediately after it is hammered into a wooden plank? Why?
Why is a ball bearing used in a cycle hub?
We have two identical metal sheets. One of them is rubbed with sand paper and the other with ordinary paper. The one rubbed with sand paper shines more than the other. Give reason.
Assertion: Friction always opposes the motion.
Reason: Whenever one surface moves or tries to move over another surface, the force of friction starts acting on the surfaces.
