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)`
The observer B finds that the work done by pseudo-force on the block is :
A. zero
B. `-ma^(2) t_(0)`
C. `+ ma^(2) t_(0)`
D. `- mg a t_(0)`
