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Describe any two methods of reducing fri...

Describe any two methods of reducing friction.

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SL ARORA-Laws of Motion-Exercise
  1. Define angle of friction and angle of repose. Show that both are numer...

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  2. It is easier to pull a lawn roller than to push it because pulling .

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  3. Describe any two methods of reducing friction.

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  4. Define force of friction. How does the use of ball bearing reduce fric...

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  5. What do you mean by ball bearings ? How sliding friction is converted ...

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  6. Calculate the amount of work done in moving a body up a rough inclined...

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  7. Derive an expression for the work done when a body slides down a rough...

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  8. Obtain an expression for the acceleration of a body sliding down a rou...

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  9. Define the term coefficient of limiting friction between the surfaces....

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  10. When a horse pulls a cart, by Newton's III law the cart also pulls the...

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  11. What is banking of roads ? Why is it essential ? Derive the equation f...

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  12. A small body tied to one end of the string is whirled in a vertical ci...

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  13. IF a stone is tied to one end of the string and whirled in verticle ci...

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  14. A person of mass m isstanding in a lift. Find his apparent weight when...

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  15. A person of mass m is standing in a lift. Find his apparent weight whe...

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  16. The mass of man when standing on the lift is 60 kg. The weight when th...

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  17. Explain why? (a) a horse cannot pull a cart and run in empty space. ...

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  18. Obtain an expression for the centripetal force F acting on a particle...

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  19. Why does a gun recoil on firing? Obtain an expression for recoil veloc...

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  20. LAWS OF LIMITING FRICTION

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