Angular momentum. A record of mass M, radius R, and thickness H is rotated by a 5N force at its edge. The piviot point is through the center, so the moment of inertia is MR?. www. a) What is the angular acceleration of the disk about its center? b) After 10 seconds of applied force, what is the angular speed (rad/sec) of the disk? (answer in terms of M, R) c) If M = 180 g and R = 15 cm, what is the speed found in part b?
Angular momentum. A record of mass M, radius R, and thickness H is rotated by a 5N force at its edge. The piviot point is through the center, so the moment of inertia is MR?. www. a) What is the angular acceleration of the disk about its center? b) After 10 seconds of applied force, what is the angular speed (rad/sec) of the disk? (answer in terms of M, R) c) If M = 180 g and R = 15 cm, what is the speed found in part b?
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Transcribed Image Text:Angular momentum.
A record of mass M, radius R, and thickness H is rotated by a 5N force
at its edge. The piviot point is through the center, so the moment of
inertia is MR?.
a) What is the angular acceleration of the disk about its center?
b) After 10 seconds of applied force, what is the angular speed (rad/sec) of the disk? (answer in
terms of M, R)
c) If M = 180 g and R = 15 cm, what is the speed found in part b?
d) If a 30g blob of silly putty falls on the record at a radial distance 6 cm, what is the new angular
speed of the record? Assume no external torques.
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