A) It gets doubled.
B) It gets quadrupled.
C) It becomes eight times.
D) It becomes one fourth.
Correct Answer: C
Solution :
\[KE=\frac{1}{2}m{{v}^{2}}\] On doubling the mass and velocity of the body, \[m'=2m;\,\,v'=2v,\,\,\therefore \,\,K.E.'=\frac{1}{2}m'{{(v')}^{2}}\] \[=\frac{1}{2}\times (2m){{(2v)}^{2}}=\frac{1}{2}\times 8m{{v}^{2}}=8\,\,K.E.\]
You need to login to perform this action.
You will be redirected in
3 sec
