JEE Main Physics question

PhysicsLaws of MotionJEE Main

A small block is shot with the same speed into each of several differently-curved frictionless tracks, all rising to the same maximum height. At the highest point of each track, the normal reaction on the block will be greatest for the track whose radius of curvature at that point is

Answer: (A)

Solution

By energy conservation, since every track rises to the same height, the block's speed at the highest point is identical for all tracks (frictionless). At that point, for a track

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Question ID VK-157585