ï»¿ A body of mass 1 kg begins to move under the action of a time dependent force F =Â Â N, whereÂ Â are units vectors along X and Y axis. What power will be developed by the force at the time (t)? from Physics Motion in A Plane Class 11 Manipur Board

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A body of mass 1 kg begins to move under the action of a time dependent force F =Â Â N, whereÂ Â are units vectors along X and Y axis. What power will be developed by the force at the time (t)?

• (2t2 + 4t4) W

• (2t3 + 3 t4) W

• (2t3 + 3t5) W

• (2t + 3t3)W

C.

(2t3 + 3t5) W

A body of mass 1 kg begins to move under the action of time dependent force,
F = (2tÂ +3t2Â ) N,
whereÂ Â are unit vectors along X and Y axis.
F = ma

Acceleration, a =Â

Integrating both sides, we get

Power developed by the force at the time t will be given as,

P = F.v = (2tÂ Â + 3t2Â ).()
Â  Â = (2t. t2 + 3t2.t3)

P = (2t3 + 3t5) W

A body of mass 1 kg begins to move under the action of time dependent force,
F = (2tÂ +3t2Â ) N,
whereÂ Â are unit vectors along X and Y axis.
F = ma

Acceleration, a =Â

Integrating both sides, we get

Power developed by the force at the time t will be given as,

P = F.v = (2tÂ Â + 3t2Â ).()
Â  Â = (2t. t2 + 3t2.t3)

P = (2t3 + 3t5) W

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