A spherical ball of mass m and radius r rolls without slipping on a rough concave surface of large radius R(R=9/7m).It makes small oscillations about the lowest point. Finds the time period. (Take g=10 m//"sec"^(2))

A spherical ball of mass m and radius r rolls without slipping on a ro

1.	A spherical ball of mass m and radius r rolls without slipping on a rough concave surface of large radius R(R=9/7m).It makes small oscillations about the lowest point. Finds the time period. (Take g=10 m//"sec"^(2))
Answer» `5 PI` SEC `sqrt(5)pi` sec `(6PI)/7` sec `sqrt(7/2)` sec Answer :C