rcmango said:okay, so i assumed that the inertia will stay the same because the radius and the mass are in the formula only.
Moment of inertia is a measure of an object's resistance to changes in its rotational motion. It is similar to mass in linear motion, but for rotational motion.
The moment of inertia depends on the shape and mass distribution of the object. It can be calculated using the object's mass, distance from the axis of rotation, and the object's inertia tensor.
The velocity of a ball does not directly affect its moment of inertia. However, an increase in velocity would result in an increase in the ball's kinetic energy, which would in turn affect its moment of inertia.
Yes, the moment of inertia can change if there is a change in the mass distribution or the axis of rotation of the object. It can also be affected by external forces such as torque.
If the mass and shape of the ball remain constant, tripling the velocity would result in a nine-fold increase in the ball's kinetic energy. This would also result in a change in its moment of inertia, making it more difficult to change the ball's rotational motion.