3 4 A block of mass m is kept in an elevator which starts

Last updated: 6/2/2023

3 4 A block of mass m is kept in an elevator which starts moving downward acceleration a as shown in figure The block is observed by two observers A and B for a time interval to The observer B finds that the work done by gravity is 1 A mg t B mg t The observer B finds that work done by normal reaction Nis B Nat 2 A zero C 5 According to observer B the net work done on the block is 1 Bma t A ma t mgat C Nat 2 1 2 mgat 2 D mg D None D