A sphere can roll on a surface inclined at an angle `theta` if the friction coefficient is more than `(2)/(7) g sin theta`. Suppose the friction coefficient is `(1)/(7) g sin theta`, and a sphere is released from rest on the incline,

A sphere can roll without slipping on a surface inclined at an angle theta if the fiiction coefficient is more than (2/7)g sin theta Suppose the friction coefficient is (l/7)g sin theta If a sphere is released from rest on this incline then which ofthe following are possible situations:

A particle is projected up a rough inclined plane of inclination theta and friction coefficient mu . If the time of ascent is half of the time of descent, the friction coefficient mu is equal to