A) twice
B) three times
C) four times
D) same
Correct Answer: B
Solution :
Energy \[(E)=\frac{1}{2}m{{v}^{2}}\] \[{{E}_{1}}=\frac{1}{2}m(400-100)=150\,m\] ...(i) \[{{E}_{2}}=\frac{1}{2}m(100-0)\] \[{{E}_{2}}=\frac{1}{2}m\times 100=50\,m\] ...(ii) From Eqs. (i) and (ii) we have \[{{E}_{1}}=3{{E}_{2}}\]You need to login to perform this action.
You will be redirected in
3 sec