An automobile wheel has a mass of 17 kg and a diameter of 0.25 m. What is the total kinetic energy of one wheel when the car is traveling at 19.4 m/s? You may treat the wheel as a solid disk.

The figure shows a rigid assembly of a thin hoop (of mass m = 0.24 kg and radius R = 0.16 m) and a thin radial rod (of length L = 2R and also of mass m = 0.24 kg). The assembly is upright, but we nudge it so that it rotates around a horizontal axis in the plane of the rod and hoop, through the lower end of the rod. Assuming that the energy given to the assembly the nudge is negligible, what is the assembly's angular speed about the rotation axis when it passes through the upside-down (inverted) orientation? Number i Rod Hoop ! Rotation axis Units

a. If the ball is released from rest at a height of 0.61 m above the bottom of the track on the no-slip side, what is its angular speed when it is on the frictionless side of the track? Assume the ball is a solid sphere of radius 2.5 cm and mass 0.14 kg.(Figure 1) Express your answer using two significant figures. rad/s   b. how high does the ball rise on the frictionless side? h=____m

A hollow ball has a radius of 2.47cm and a mass of 7kg and is rolling, it is traveling with a translational speed of 8m/s.  What is its kinetic energy?