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AB is a frictionless inclined surface ma...

`AB` is a frictionless inclined surface making an angle of `30^@` with horizontal. A is `6.3 m` above the ground while `B` is `3.8 m` above the ground. A block slides down form `A`, initially starting from rest. Its velocity on reaching `B` is
.

A

`7 ms^(-1)`

B

`14 m s^(-1)`

C

`7.4 ms^(-1)`

D

`4.9 ms^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
`(1)`
gain in K.E = Loss of P.E = `mg(h_(1) - h_(2))`
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NARAYNA-WORK , ENERGY & POWER -EXERCISE -II (H.W)
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  18. Two balls marked 1 and 2 of the same mass m and a third ball marked 3 ...

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  20. A 10 gm bullet is fired from a rifle horizontally into a 5 kg block of...

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