NTA Abhyas JEE Main2020PhysicsLaws of MotionPractice
A small block of mass m is released from rest from point A inside a smooth hemisphere bowl of radius R , which is fixed on ground such that OA is horizontal. The ratio (x) of magnitude of centripetal force and normal reaction on the block at any point B varies with θ as:
Correct answer
0
Step-by-step solution
m v 2 R = N - m g sin θ N = m v 2 R + m g sin θ By energy conservation, m g R s i n θ = 1 2 m v 2 m v 2 R = 2 m g sin θ N = 3 m g sin θ R a t i o = m v 2 R N = 2 3 (constant) x = 2 3