12.A man drags a heavy load up an inclined plane as shown below. The pulley consists of two unequaldisks; one is larger than the other. The man applies a constant force on the larger disk of radius R = 20 cm, and theload is dragged via a cord that wraps around the smaller disk of radius r = 10 cm. The surface of the incline is roughwith µz = 0.4.a) What is the force required to pull the load at constantspeed?b) What is the work done by the man on the pulley for twofull rotations?cordc) If the cord suddenly breaks, what would be the angularacceleration of the pulley under the force of man?(Ipulley = 3.6 kgm²)120 kgAnswers: a) 379.37 N; b) 953.46J ; c) 21.08 rad/s²15°

(a) Let r denotes the smaller disk radius, R denotes the larger disk radius, F denotes the force…

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