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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)`

Answer» Correct Answer - B


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