A block of 1 kg is kept on a rough surface of an elevator moving up with constant velocity of 5 m/s. In 10 second work done by normal reaction (no sliding on incline surface)
(i) from ground frame is 320 J
(ii) is equal to work done by friction force in elevator frame
(iii) is equal to work done by friction in ground frame
A. (i)
B. (ii), (iii)
C. (i), (ii)
D. only (iii).
