OBF Practice Questions - OBF - Olimpíada Brasileira De Física Exam

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A small block of mass m rests on top of a frictionless sphere of radius R fixed to the ground. The block is given a tiny push so that it slides down the surface. At what vertical height h above the ground (measured from the base of the sphere) does the block lose contact with the sphere?

h = (4/3) R h = (3/2) R h = (5/3) R h = (7/5) R

Correct Answer:

h = (5/3) R

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