Question

particle of mass m is going around a circle of radius r. with velocity v in uniform circular motion. Work done by the centripetal force during the particle covers semicircle will be given by (A) 2mv^2 (B)1/2 mv (С) √2 mv^2 (D) Zero​

Answer 1

correct answer is b

b is the correct answer

Explanation:

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Answer 2

The work done by the centripetal force during the particle covers in zero.

Explanation:

The centripetal acceleration $a_c=\frac{v^{2} }{r} }$

$=r$ω $v=r$ω

Work done, $W=$F⊥ r, where r is the displacement vector 0.