e A 12-g CD with a radius of 6.0 cm rotateswith an angular speed of 34 rad/s. (a) What is its kinetic energy?(b) If its kinetic energy is to be quadrupled, should its angularspeed be doubled, quadrupled, or increased by a factor of 16? (c)Calculate the angular speed required to quadruple the kineticenergy the CD had in part (a)

Rolling Problems 6. A yo-yo can be thought of as being two uniform disks, each of radius 5 cm and mass 150 grams. The string is would around a small post of negligible mass and moment of inertia, but radius 1 cm. Starting from rest, the yo-yo falls a distance h and reaches a final speed of 1 m/s. What was h? NAME:

A bowler throws a bowling ball of radius R = 11 cm along a lane. The ball (the figure) slides on the lane with initial speed vcom.O friction between the ball and the lane is 0.29. The kinetic frictional force k acting on the ball causes a linear acceleration of the ball while producing a torque that causes an angular acceleration of = 8.4 m/s and initial angular speed wo 0. The coefficient of kinetic the ball. When speed vcom has decreased enough and angular speed p has increased enough, the ball stops sliding and then rolls smoothly. During the sliding, what are the ball's (a) linear acceleration and (b) angular acceleration? (c) How long does the ball slide? (d) How far does the ball slide? (e) What is the linear speed of the ball when smooth rolling begins? Note that the clockwise direction is taken as negative. Vcom (a) Number -2.84 Units m/s^2 (b) Number -64.59 Units rad/s^2 (c) Number Units 0.84 (d) Number" Units (e) Number Units TTII

7.3 A 6.0-kg bowling ball with a radius of 12 cm rolls in a straight line past you at a speed of 3.0 m/s. At its point of closest approach, it is 3.0 m away from you. Say that we define our coordinate system centered on you so that the ball rolls parallel the the +y-direction and the z-direction is vertically upward. What are the components of the ball's total angular momentum about your position?