Question

A turntable has a moment of inertia of 3.00 × 10−2 kg · m2 and rotates freely on a frictionless support at 25.0 rev / min. A 0.600 kg putty ball is dropped vertically onto the turntable and glued at a point 0.100 m from the center.

By what factor does the kinetic energy of the system change after the putty is dropped onto the turntable?

TO.

0.91

B.

1.00

C.

0.83

D.

1.50

Answer #1

A turntable has a moment of inertia of 3.0 × 10−2
kg·m2 and spins freely on a frictionless bearing at 25
rev/min. A 0.60-kg ball of putty is dropped vertically on the
turntable and sticks at a point 0.10 m from the center. By what
factor does the kinetic energy of the system change after the putty
is dropped onto the turntable?
a. 1.0
b. 0.83
c. 1.5
d. 0.91

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