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velocity of a body of mass 2kg moving in...

velocity of a body of mass `2kg` moving in `x-y` plane is given by `vecv=(2hati+4thatj)m//s`, where `t` is the time in second. The power delivered to the body by the resultant force acting on it at `t=5sec` is.

A

80 W

B

160 W

C

40 W

D

100 W

Text Solution

Verified by Experts

The correct Answer is:
B
Power `= (d(K.E))/(dt)`
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