Because of friction, rotational kinetic energy is not conserved while the disks' surfaces slip over each other. what is the final rotational kinetic energy, kf, of the two spinning disks? express the final kinetic energy in terms of it, ir, and the initial kinetic energy ki of the two-disk system. no angular velocities should appear in your answer.

Which sound characteristic is not affected by the relative motion of an object

Often called simply "velocity," this is the velocity of an object at a particular moment in time.

Amachinist turns the power on to a grinding wheel, at rest, at time t = 0 s. the wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 96 rad/s. the wheel is run at that angular velocity for 40 s and then power is shut off. the wheel slows down uniformly at 1.5 rad/s2 until the wheel stops. in this situation, the time interval of deceleration is closest to: