A small blob of putty of mass m falls from the ceiling and lands on the outer ri
ID: 1325554 • Letter: A
Question
A small blob of putty of mass m falls from the ceiling and lands on the outer rim of a turntable of radius R and moment of inertia I0 that is rotating freely with angular speed ?0 about its vertical fixed-symmetry axis. (Use any variable or symbol stated above as necessary.) (a) What is the postcollision angular speed of the turntable-putty system? ?f = (b) After several turns, the blob flies off the edge of the turntable. What is the angular speed of the turntable after the blob's departure? ? =
Explanation / Answer
Angular momentum is conserved in both cases.
(a)
(Io)(?o) = (Io + mR