In a hammer throw event, a solid sphere of mass `16 kg` is tied to a light `50 cm `long chain. A sportsman gives to ita constant moment of `30 N-m` for ` 10` seconds and then throws the sphere. Consider the sphere as a point mass. Find the moment of inertia about the axis of rotation.

a) Find the moment of inertia of a sphere about a tangent to the sphere, given the moment of inertia of the sphere about any of its diameters to be (2MR^2)/5 , where M is the mass of the sphere and R is the radius of the sphere. b) Given the moment of inertia of a disc of mass M and radius R about any of its diameters to be MR^2/4 , find its moment of inertia about an axis normal to the disc and passing through a point on its edge.

A solid sphere of mass 3kg rolls on a horizontal surface with a linear speed of 30m/s . Find the total kinetic energy of the sphere.

A cord of negligible mass in wound round the rim of flywheel of mass 20 kg and radius 20cm mounted on a horizontal axis Calculate the angular acceleration of the wheel if a steady pull of 25N is applied on the cord. Moment of inertia of flywheel about its axis= MR^2/2