The work done by the force of gravity is 100 J
A. If bob is given an initial velocity `u=12` m/s it complete the loop
B. If `u=8m//s` maximum height attained by bob is 4 m
C. If `u=10m//s,` maximum height attained by bob is 4 m
D. If `u=2 m//s,` it excautes oscillation
