A body of mass 1 kg begins to move under the action of a
time dependent force F=(2tˆi+3t2ˆj) N, where ˆi and ˆj are
unit vectors alogn x and y axis. What power will be
developed by the force at the time t? [2016]
(a) (2t² + 3t³)W (b) (2t² + 4t⁴)W
(c) (2t³ + 3t⁴) W (d) (2t³ + 3t⁵)W
Answers
Answered by
8
Answer:
a=F/M
a= 2ti+3t^2j
on integrating we get velocity
V = 2*t^2/2 i+ 3 t^3/3 j
= t^2+t^3
Power = F.V ( power = w/t = F.S/t= F.V,S- displcemnt)
= 2t^3+3t^5
Answered by
3
Answer:
a=F/M
a= 2ti+3t^2j
on integrating we get velocity
V = 2*t^2/2 i+ 3 t^3/3 j
= t^2+t^3
Power = F.V ( power = w/t = F.S/t= F.V,S- displcemnt)
= 2t^3+3t^5
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