A particle of mass m is projected from point A with an initial velocity v0 perpendicular t...

A particle of mass m is projected from point A with an initial velocity v0 perpendicular to line OA and moves under a central force F along a semicircular path of diameter OA. Observing that r = r0 cos θ and using Eq.(12.27), show that the speed of the particle is υ =υo/cos2 θ.

Fig. P12.78