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A block of mass mis kept in an elevation...

A block of mass mis kept in an elevation which starts1 moving downward with an acceleration aas shown in figure. The block is observed by two observers A and B for a time interval `t_(0)`

According to observer B, the net work done on the block is:

A

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

B

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

C

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

D

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

Text Solution

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The correct Answer is:
B
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