# DUS ANSWERS PSET 13.P.070 MY NOTES PRACTICE ANOTHER A ball of mass M-1.20 kg and radius...

###### Question:

DUS ANSWERS PSET 13.P.070 MY NOTES PRACTICE ANOTHER A ball of mass M-1.20 kg and radius r = 4.70 cm is attached to one end of a thin, cylindrical rod of length - 18.0 cm and mass m=0.880 kg. The ball and rod, initially at rest in a vertical position and free to rotate around the axis shown in the figure below, are nudged into motion M (a) What is the rotational kinetic energy of the system when the ball and rod reach a horizontal position? (b) What is the angular speed of the ball and rod when they reach a horizontal position? 72 X Your response differs from the correct answer by more than 10% Double check your calculations, rad/s (c) What is the linear speed of the center of mass of the ball when the ball and rod reach a horizontal position? ms (d) What is the ratio of the speed found in part (c) to the speed of a ball that falls freely through the same distance? Vree

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