In the pulley-block system shown in figure, strings are light. Pulleys are massless and smooth. System is released from rest. In `0.3` seconds.
.
(a) work done on `2 kg` block by gravity is `6 J`
(b) work done one `2 kg` block by string is `-2 J`
( c) work done on `1 kg` block by gravity is `-1.5 J`
(d) work done on `1 kg` block string is `2 J`.
A. work done on 2 kg block by gravity is 6 J
B. work done on 2 kg block by string is `-2 J`
C. work done on 1 kg block by gravity is `1.5 J`
D. work done on 1 kg block by string is 2 J
