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The KE of a freely falling body...

The `KE` of a freely falling body

A

is directly proportional to height of its fall

B

is inversely proportional to height of its fall

C

is directly proportional to square of time of its fall

D

`1` and `3` are true

Text Solution

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The correct Answer is:
D
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NARAYNA-WORK POWER AND ENERGY-C.U.Q-Key
  1. When two identical balls are moving with equal speed in opposite direc...

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  2. The product of linear momentum and velocity of a blood represents.

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  3. The KE of a freely falling body

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  4. Consider the following two statements: A. Linear momentum of a syste...

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  5. Internal forces can change

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  6. If the force acting on a body is inversely proportional to its speed, ...

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  7. Which of the following graphs depicts the variation of KE of a ball bo...

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  8. Which of the following statements is correct?

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  9. Two bodies of unequal masses have same linear momentum. Which one has ...

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  10. Two bodies of masses m(1) and m(2) have equal KE. Their momenta is in...

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  11. A body can have

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  12. A rock of mass m is dropped to the ground from a height h. A second ro...

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  13. These diagrams represent the potential energy U of a diatomic molecule...

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  14. Two springs have their force constants K(1) and K(2) and they are stre...

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  15. Two spring have their force constants K(1) and K(2)(K(2) gt K(1)). Whe...

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  16. A lorry and a car moving with the same KE are brought to rest by apply...

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  17. A shell is fired into ait at an angle theta with the horizontal form t...

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  18. A cricket ball and a ping-pong ball are dropped. When they vacuum cham...

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  19. A cyclist free-wheels from the top of a hill, gathers speed going down...

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  20. If 'E' represents total mechanical energy of a system while 'U' repres...

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