Why are not able to rotate a wheel by pulling or pushing along its radius ?

It is easier to roll a barrel than to pull it along the road. Why ?

A mark on the rim of a rotating cicular wheel of 0.50 m radius is moving with a speed of 10 ms^(-1) . Find its angular speed.

The spokes of a wheel are made of metal and their lengths are of one metre. On rotating the wheel about its own axis in a uniform magnetic field of 5xx10^(-5) tesla normal to the plane of the wheel, a potential difference of 3.14 mV is generated between the rim and the axis. The rotational velocity of the wheel is-

The radius of a wheel is R and its radius of gyration about its axis passing through its center and perpendicualr to its plane is K. If the wheel is roling without slipping. Then the ratio of tis rotational kinetic energy to its translational kinetic energy is

What is the push or pull on an object known as ?

The wheel of an automobile is rotating with 4 rotations per second. Find its angular velcoity . If the radius of the fly wheel, is 50 cm , find the linear velcotiy of a point on its cicrumfernce.

A wheel is rotating about a its own axis. The moment of inertia of the wheel about axis of rotation.If its angular speed is 30 rad/sec and its kinetic energy is 300J ( in kg-m^(2))