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A block of mass m is kept in an elevatio...

A block of mass `m` is kept in an elevation which starts moving downward with an acceleration 'a' as shown in figure. The block is observed by two observers `A` and `B` for a time interval `t_(0)`.
.
The observer `B` finds that the work done by gravity on the block is :

A

`-(1)/(2) mg^(2) t_(1)^(0)`

B

`(1)/(2) mg^(2) t_(0)^(2)`

C

`(1)/(2) mg at_(0)^(2)`

D

`-(1)/(2) mg at_(0)^(2)`

Text Solution

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The correct Answer is:
C
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