A ring starts from rest and acquires an angular speed of `10 rads^-1` in `2 s`. The mass of the ring is `500 gm` and its radius is `20 cm`. The torque on the ring is.

A wheel starts from rest and acquires an angular velocity of 60 rad//s in half a minute . Then its angular acceleration is

A wheel starts from rest and acquires an angular velocity of 60 rad//s in half a minute. Then its angular acceleration is

If a disc starting from rest acquires an angular velocity of 240 "rev min"^(-1) in 10 s, then its angular acceleration will be

A ring has a mass of 0.5 kg and radius 1 m. The moment of inertia of the ring about its diameter is

A ring has a total mass M but non-uniformly distributed over its circumference. The radius of the ring is R . A point mass m is placed at the centre of the ring. Workdone in taking away this point mass from ecntre to infinity is

A circular ring of mass 10 kg rolls along a horizontal floor. The center of mass of the ring has a speed 1.5 m//s. The work required to stop the ring is

A thin ring of 10 cm radius carries a uniformly distributed charge. The ring rotates at a constant angular speed of 40pi "rad s"^(-1) about its axis, perpendicular to its plane. If the magnetic field at its centre is 3.8xx10^(-9)T , then the charge carried by the ring is close to (mu_(0)=4pi xx10^(-7)N//A^(2))