# physics, torque

A crane shown in the drawing is lifting a 170-kg crate upward with an acceleration of 1.8 m/s2. The cable from the crate passes over a solid cylindrical pulley at the top of the boom. The pulley has a mass of 130 kg. The cable is then wound onto a hollow cylindrical drum that is mounted on the deck of the crane. The mass of the drum is 150 kg, and its radius is 0.76 m. The engine applies a counterclockwise torque to the drum in order to wind up the cable. What is the magnitude of this torque? Ignore the mass of the cable.

write the force equation Torque= ma/radiusdrum+ Ipulley*alphap + Idrum*alphad

Now on alphap, and alphad, that will be the acceleration of the cable/radius

Solve for Torque

chcek my thinking. THis is a thinkig problem.

1. 👍 0
2. 👎 0
3. 👁 165

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