A body of mass 1 kg begins to move
under the action of a time dependent force
(2ti + 3t2j)N, where i and j are unit
vectors along x and y axis. What power
will be developed by the force at the time
 

Answers (2)
S safeer

F=ma

m=1

Velocity is obtained by integrating acceleration.

V=t^2+t^3

P=F.v=2t^3+3t^5

S safeer

@gulamjilani

P=F.v

v is obtained by integrating acceleration

v=t^2i+t^3j

 

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