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Power delivered by a force at an instant (P = F times v)

This type of question, asked 3 times: 15 May 2023 S1, 22 Apr 2025 S1, 16 Apr 2026 S2. All 3 questions below, oldest first.

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  1. Question 1

    15 May 2023 S1

    50
    A body of mass 1 kg starts from rest and moves with uniform acceleration. In 2 seconds, its velocity is 10 m/s. The power exerted on the body in one second is

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  2. Question 2

    22 Apr 2025 S1

    35
    A body of mass 1 kg begins to move under the action of a time dependent force F→=(ti^+2t2j^)N\overrightarrow{F}=\left( t\widehat{i}+ 2t^{2}\widehat{j} \right)N, where i^\widehat{i} and j^\widehat{j} are unit vectors along xx and yy axis. The power developed by above force at time t=3t= 3 second will be

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  3. Question 3

    16 Apr 2026 S2

    104
    A body of mass 1kg begins to move under the action of a time dependent force F⃗=(ti^+3t2j^)\vec{F} = (t\hat{i} + 3t^2\hat{j}) N where i^\hat{i} and j^\hat{j} are the unit vectors along x and y axis. The power developed by the above force at time t=2t = 2 s will be (in watt)

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