A small solid sphere rolls without slipping along a track that ends in a vertical…

PHYSICS · Single correct · CBSE · Physics · Work, Energy and Power · Work, Energy and Power

Problem

A small solid sphere rolls without slipping along a track that ends in a vertical loop of radius

R

. The sphere is released from rest at a height

h

above the lowest point of the loop. What is the minimum value of

h

(measured from the lowest point) that allows the sphere to maintain contact with the track at the top of the loop? (a)

3.4R

(b)

2.5R

(c)

2.7R

(d)

3.0R