Question

Sir Lancelot rides slowly out onto the 12.0 m long drawbridge. Unbeknownst to him, the cable holding up the front end of the bridge will break under a tension of 6800 N. The cable makes a 60.0° angle with the bridge. The bridge has a mass of 200 kg. Lancelot, his horse, and his gear have a mass of 600 kg.

A) What is the maximum torque applied by the cable? (Give your answer in units of N m.)

B) What is the torque from the weight of the bridge?

C) Assuming the cable is strong enough, what would the net torque be due to Lancelot and the weight of the drawbridge when he is at the end of the drawbridge? (Give your answer in units of N m.)

D) How far from the cast will he be when the cable breaks? (Give your answer in units of m.)

Answer 1