A) \[\frac{2m\upsilon }{t}\]
B) \[\frac{2m(\upsilon +u)}{t}\]
C) \[\frac{2m(\upsilon +2u)}{t}\]
D) \[\frac{m(\upsilon +2u)}{t}\]
Correct Answer: B
Solution :
Relative speed of the ball\[=(v+u)\] Speed after rebouncing\[=-(y+u)\]\[=-(v+u)\] Now, \[F=m\frac{\Delta v}{\Delta t}=\frac{m}{t}[(v+u)]-[(v+u)]\] \[=\frac{2m}{t}(v+u)\]You need to login to perform this action.
You will be redirected in
3 sec