Question: A 2000-kg block is lifted at a constant speed of 8 cm/s by a steel cable that passes over a massless pulley to a motor-driven

A 2000-kg block is lifted at a constant speed of 8 cm/s by a steel cable that passes over a massless pulley to a motor-driven winch (Figure). The radius of the winch drum is 30 cm.

(a) What force must be exerted by the cable?

(b) What torque does the cable exert on the winch drum?

(d) What power must be developed by the motor to drive the winch drum?

r3 30 ст т. т (2000 kg)g

r3 30 . (2000 kg)g

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