A) 40 J
B) 60 J
C) 100 J
D) 140 J
Correct Answer: B
Solution :
\[v=36\,km/h=10\,m/s\] By law of conservation of momentum \[2\times 10=(2+3)\,V\] Þ \[V=4\,m/s\] Loss in K.E.\[=\frac{1}{2}\times 2\times {{(10)}^{2}}-\frac{1}{2}\times 5\times {{(4)}^{2}}=60\,J\]
You need to login to perform this action.
You will be redirected in
3 sec
