Question

An object of mass 2 kg attached to a wire of length 5 m is revolved in a horizontal circle. If it makes 60 r.p.m. final its
(a) Angular speed
(b) Linear speed
(c) Centripetal acceleration
(d) Centripetal force.

Answer 1

$\omega =60rpm\frac{60\left(2\pi \right)}{60}=2\pi rad/secv=\omega r=2\pi \left(5\right)=10\pi ㎧a_c={\omega }^{2}r=20\pi ㎨F_c=m{\omega }^{2}r=40\pi Newton$