Question

A particle performs uniform circular motion in a horizontal plane. The radius of the circle is 8 cm. The centripetal force acting on the particle is 15 N. Its kinetic energy is ____________.

Options

• 0.1 J

• 0.2 J

• 2.0 J

• 0.6 J

Answer 1

A particle performs uniform circular motion in a horizontal plane. The radius of the circle is 8 cm. The centripetal force acting on the particle is 15 N. Its kinetic energy is 0.6 J.

Explanation:

r = 8 cm= 8 x 10^-2 m = 0.08 m

`"Using, F" = "mv"^2/"r" = 15`

`therefore 1/2  "mv"^2`

` = 15 xx "r"/2`

` = 15 xx 0.08/2`

` = 0.6  "J"`