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Two objects having same mass 'm' are mov...

Two objects having same mass 'm' are moving with velocities v and 2v. Find ratio of their kinetic energies.

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MBD -HARYANA BOARD-WORK, ENERGY AND POWER-Example
  1. (a) What do you understand by the kinetic energy of a body ? (b) A b...

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

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

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

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

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

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

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

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

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

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

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

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  13. Commercial Unit Of Energy

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

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

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

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

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

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

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  20. Work done by a force on an object is zero, if

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