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PhysicsNEET 2024Power and vertical circular motion

Work, Energy and Power

At any instant of time tt, the displacement of a particle is given by 2t−12t - 1 (SI units) under the influence of a force of 5 N. The value of the instantaneous power is (in SI units):

  1. A.5
  2. B.7
  3. C.6
  4. D.10✓

Solution

Velocity v=dxdt=2v = \frac{dx}{dt} = 2 m/s (constant). Instantaneous power P=Fv=5×2=10P = Fv = 5 \times 2 = 10 W.

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