A) \[\frac{1}{2}m{{v}^{2}}\]
B) \[\frac{5}{3}m{{v}^{2}}\]
C) \[\frac{2}{5}m{{v}^{2}}\]
D) \[\frac{7}{10}m{{v}^{2}}\]
Correct Answer: D
Solution :
Take KE at bottom \[KE=\frac{1}{2}m{{v}^{2}}\left[ 1+\frac{{{K}^{2}}}{{{R}^{2}}} \right]\] \[=\frac{1}{2}m{{v}^{2}}\left[ 1+\frac{2}{5} \right]\] \[=\frac{7}{10}m{{v}^{2}}\]You need to login to perform this action.
You will be redirected in
3 sec