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

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 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 the observer A :

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 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 pseodo-force on the block is

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 gravity on the block is :

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 block of mass M is kept in elevator (lift) which starts moving upward with constant acceleration b as shown in figure. Initially elevator at rest. The block is observed by two observers A and B for a time interval t=0 to t=T . Observer B is at rest with respect to elevator and observer A is standing on the ground. Q. The observer A finds that work done by normal reaction acting on the blocks is

A block of mass M is kept in elevator (lift) which starts moving upward with constant acceleration b as shown in figure. Initially elevator at rest. The block is observed by two observers A and B for a time interval t=0 to t=T . Observer B is at rest with respect to elevator and observer A is standing on the ground. Q. The observer A finds that work done by normal reaction acting on the blocks is

A block of mass M is kept in elevator (lift) which starts moving upward with constant acceleration b as shown in figure. Initially elevator at rest. The block is observed by two observers A and B for a time interval t=0 to t=T . Observer B is at rest with respect to elevator and observer A is standing on the ground. Q. The observer A finds that the work done by gravity on the block is

A block of mass M is kept in elevator (lift) which starts moving upward with constant acceleration b as shown in figure. Initially elevator at rest. The block is observed by two observers A and B for a time interval t=0 to t=T . Observer B is at rest with respect to elevator and observer A is standing on the ground. Q. The observer A finds that the work done by gravity on the block is