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How does kinetic energy of a moving ball...

How does kinetic energy of a moving ball change if its speed is reduced to half of original speed. Take mass of ball = 4 kg and original speed = 20 m/s.

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SL ARORA-Work, Energy and power-EXERCISE
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  2. Show graphically the variation of potential energy of an object thrown...

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  3. How does kinetic energy of a moving ball change if its speed is reduce...

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  4. What is the work done by centripetal force in moving a body through ha...

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  5. What is an elastic collision ?

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  6. Define the term work. Calculate the work done by a constant force. Is ...

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  7. Give the expression for work done if angle between force oversetrighta...

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  8. Define the term work and derive its SI unit. Write an expression for t...

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  9. How do we calculate work done by a force ? Write any two conditions un...

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  10. What is the amount of work done by a weight-lifter in holding a weight...

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  11. What is the amount of work done by a weight-lifter in holding a locomo...

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  12. Derive an expression for the potential energy of an elastic stretched ...

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  13. Define power. Prove that P=oversetrightarrowF.oversetrightarrowv wher...

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  14. By what factor the velocity of a body should be increased so that its ...

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  15. Two bodies A and B weighing 5 kg and 6 kg respectively have equal mome...

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  16. Define kinetic energy. Give its units and dimensional formula.

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  17. Define potential energy. Give its units and dimensional formula.

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  18. Draw the variation of potential energy and kinetic energy of a block a...

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  19. State and prove the principle of conservation of mechanical energy.

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  20. What is meant by mass energy equivalence ? Discuss its significance in...

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