Most Important Selected Qs for JEE AdvancedPhysicsRotational Motion
Paragraph: Greek lores have a fable of Sisyphus, a celebrated philosopher. He was punished in Hades for rebelling against the king. The punishment was to roll a spherical stone up a hill from where it would invariably roll down to the other side. He would run after the stone, to catch it back and roll it back uphill. The top of the hill was always a position of unstable equilibrium. The sphere and Sisyphus have same
Options
- A3 2
- B2
- C2 7
- D5 7
Correct answer
A. 3 2
Step-by-step solution
aligned & F _ F at R , =0, a =0 & mg + F = f ₁ sisyphus & F + f ₂= mg stone & FR = f ₂ R Stone & F = f ₂ ~F = mg 2 = f ₂ mg & array l / 2 array & for sisyphus, & array l mgsin F = f ₁ mg 3 mg 2 mg array 3 / 2 aligned For stone to roll as well as sisyphus to not slip 3 / 2 .