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Assertion: Force of friction depends on ...

Assertion: Force of friction depends on the actual area of contact.
Reason: Larger the area of actual contact, larger is oppose to motion.

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Assertion : Force of friction depends on the actual area of contact Reason : Smoother the surfaces of contact smaller is opposition to motion .

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SL ARORA-Laws of Motion-Exercise
  1. A body slides down an inclined plane having friction. Indicate the dir...

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  2. Give an example of the use of friction.

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  3. Assertion: Force of friction depends on the actual area of contact. ...

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  4. What is the angle of friction between two surfaces in contact , if coe...

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  5. ANGLE OF FRICTION

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  6. It is easier to roll a barrel than to pull it along the road. Why ?

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  7. Why are rockets given conical shape ?

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  8. Arrange mus , muk and mur in ascending order.

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  9. A body is moving along a circular path such that its speed is always c...

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  10. What provides the centripetal force to a satellite revolving around th...

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  11. What is the source of centripetal force , when an electron revolves ar...

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  12. Can centripetal force produe rotation ?

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  13. Which is real among the centripetal and centripetal forces ?

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  14. What provides centripetal force to a car turning on a level road ?

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  15. Does the angle of banking depend on mass of the vehicle ?

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  16. When a body moves along a circular path which thing experiences centri...

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  17. A body is travelling with a constant speed on the circumference of a c...

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  18. A body is travelling with a constant speed on the circumference of a c...

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  19. How many newtons make one kg wt. ?

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  20. Define impulse. Give its SI unit.

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