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(a) What do you understand by the kineti...

(a) What do you understand by the kinetic energy of a body ?
(b) A body is thrown vertically upwards. Its velocity goes on decreasing. What happens to its kinetic energy as its velocity becomes zero ?
(c) A horse and a dog are running with the same speed. If the weight of the horse is ten times that of the dog, what is the ratio of their kinetic energies ?

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MBD -HARYANA BOARD-WORK, ENERGY AND POWER-Example
  1. Can a given amount of mechanical energy be completely converted into h...

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  2. Differentiate between Potential Energy and Kinetic Energy.

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  3. (a) What do you understand by the kinetic energy of a body ? (b) A b...

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  4. Two masses m and 2m are dropped from height h and 2h. On reaching the ...

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  5. Two objects having same mass 'm' are moving with velocities v and 2v. ...

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  6. A man drops a 10 kg rock from the top of a 20 m ladder. What will be i...

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  7. A rocket of maxx 3xx10^6kg takes off from a launching pad and acquires...

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  8. An electric heater of 1000W is used for 2 hours a day. What is the cos...

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  9. The power of a motor pump is 5 kW. How much water per minute the pump ...

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  10. Calculate the electricity bill amount for the month of November of a f...

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  11. A person carrying 10 bricks each of man 2.5 kg. on his head moves to a...

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  12. A car of 1000 kg moving with a velocity of 30 m//s stops with uniform ...

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  13. What is the kinetic energy of a body of mass 1 kg moving with a speed ...

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  14. The work done by the heart 1J per beat. Calculate the power of the hea...

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  15. Commercial Unit Of Energy

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

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  17. A body is thrown vertically upwards ? Its velocity goes on decreasing...

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  18. If the heart works 60 joules in one minute, what is its power ?

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  19. Fill In the blanks: is the sum of kinetic energy and potential ener...

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  20. How many joules are there in one kilowatt-hour?

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