Question

30-cm-diameter, 1.0 kg solid turntable rotates on a 1.4-cm-diameter, 450 g shaft at a constant 33 rpm. When you hit the stop switch, a brake pad presses against the shaft and brings the turntable to a halt in 18 seconds.

Answer 1

Answer:

Transcribed image text: A 30-cm-diameter, 1.4 kg solid turntable rotates on a 1.8-cm-diameter, 450 g shaft at a constant 33 rpm. When you hit the stop switch, a brake pad presses against the shaft and brings the turntable to a halt in 18 seconds. How much friction force does the brake pad apply to the shaft?

Explanation: