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What is the force required to lift a boo...

What is the force required to lift a book of mass m? This force is required to overcome which force?

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MODERN PUBLICATION-WORK AND ENERGY-EXERCISE
  1. A stationary football is kicked by a player such that it attains a spe...

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  2. Find the work done in in reasing the speed of car from 18 kmh^-1 to 36...

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  3. What is the force required to lift a book of mass m? This force is req...

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  4. What happens to the potential energy if the height of a body is double...

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  5. Give two example of bodies possessing gravitational P.E.

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  6. Give two example of bodies possessing elastic P.E.

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  7. Define potential energy. Derive an expression for it. On what factors ...

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  8. A body of mass 6 kg is kept at a height of 5 m from the surface of ear...

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  9. The body of mass 6 kg is taken from a height of 5 m to a height of 10 ...

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  10. An object of mass 12 kg is at a certain height above the ground. If th...

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  11. A boy of mass 40 kg climbs vertically upwards on a coconut tree to a h...

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  12. A boy of mass 40 kg climbs vertically upwards on a coconut tree to a h...

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  13. In a solar cell panel, energy is converted into energy.

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  14. In a micorphone, energy is converted into energy.

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  15. The point of minimum kinetic energy in case of oscillating pendulum is...

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  16. Graphically show the variation of potential energy of a freely falling...

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  17. During a free fall K.E1 + P.Ei + = K.Ef+. Here I = initial and f = fin...

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  18. A body is thrown vertically upwards. During it srise the potential ene...

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  19. Name five devices and the energy conversion that takes place in the de...

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  20. A 2 kg ball is dropped from a height of 1. Find its kinetic energy jus...

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