Question

The kinetic energy k of a particle moving along a circle of radius R depends on the distance covered s as k= as²  where a is a constant. The total force acting on the particle is:

(A) \(2a\frac{s^2}{R}\)

(B) 2as \(\left(\frac{s^2}{R^2}\right)^{1/2}\)

(C) 2as

(D) 2as \(\frac{R^2}{s^2}\)

Answer 1

Correct option is (B) \(2as \left(\frac{s^2}{R^2}\right)^{1/2}\)

Kinetic energy k = 1/2 mv²

But given that k = as²

Answer 2

Correct answer is (B) 2as \(\left(\frac{s^2}{R^2}\right)^{1/2}\)