Question

3. A merry-go-round (uniform disk) of mass M = 125 kg and radius R = 1.5 m is rotating initially wi = 12 rad/s. A person (we'll call the person a thin uniform rod) of mass m = 65 kg and height h= R initially stands over the rotation axis. The person decides to lie down with feet at the center and head at the outer edge (see figure). Since the person is a "thin rod', we can ignore the initial moment of inertia and call the person's final moment of inertia the same as a thin uniform rod rotating with the merry-go-round. a. Find the final angular speed wf. mh MR b. Find the final kinetic energy of the configuration.

Answer 1

M.125 ,RE1Sm, w RAadfree, R=R21.5m Ak Aent care, Mammtrof inntial yMRi ine inertin 2 2 & nd Cone, M.2. of h mam, mp2 2 okal M.2., 2p 140-625+ (95 335. (25 m Eormatwaton of 335.025 140-635x 12 335 025 xu 6.03 hadfoec fimak nanatte nangy K 385-25x (5-03) O-273 & 2 2 4.2x10 J 2