A gladiator is using a ball and chain as a weapon (assume its moment of inertia is similar to a thin hoop). The mass of the chain is negligible and it is 1.25 m in length. The mass of the ball, located at the end of the chain, is 3.0 kg. If the gladiator starts to accelerate the ball and chain from rest to 5 rpm determine (a)The moment of inertia of the ball and chain.
(b)The rotational kinetic energy of the ball and chain at 5 rpm.
(c)If it took 3 s for the gladiator to get the ball and chain up to speed, what was the average torque applied?
(d)Assuming the gladiator continues to apply the torque in a constant manner, how much power must the gladiator exert?

Is a  vector quantity  that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.

Transfer of electrons. hope it !