Question : A ball having a mass M and negligible size moves within a sm...

A ball having a mass M and negligible size moves within a smooth vertical circular slot. If it is released from rest at { θ }_{ 1 } , determine the force of the slot on the ball when the ball arrives at points A and B. Given: M = 2 kg , θ = 90 deg , { θ }_{ 1 } = 10 deg , r = 0.8 m , g = 9.81   { m/s }^{ 2 }