Question

The power imparted by a variable force to a moving object is observed to remain constant with time. State that relation between the instantaneous value of the force and the velocity of the moving object

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Answer 1

Explanation:

Mathematically Power is given by

P = f × v

P = fv x costheta

Now when the power is constant, then the change in force or change in velocity are balanced out by the cosine of the angle between them. When the angle is zero, then the entire change in force shall be countered by the change in speed