Answer: 2. 10 Key idea: Instantaneous power P=vec F·vec v . Velocity v=d/dt(2t-1)=2 m/s (constant). Then P=Fv=5×2=10 W. Option 2.

Topic: Power· Work, Energy and Power

At any instant of time t, the displacement of any particle is given by 2t-1 (SI unit) under the influence of force of 5N. The value of instantaneous power is (in SI unit):

1. 6

2. 10

3. 5

4. 7

Doubtly Asked 30 Oct 2026 NEET UG 2024 Practice test neet Save WhatsApp Report

1 answer

Best answer

Answer: 2. 10

Key idea: Instantaneous power \(P=\vec F\cdot\vec v\).

Velocity \(v=\frac{d}{dt}(2t-1)=2\) m/s (constant). Then \(P=Fv=5\times2=10\) W.

Option 2.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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