Question

The mass of the crane is 20,000 kg. The crane’s cable is attached to a caisson whose mass is 400 kg. The tension in the cable is 1 kN. 

(a) Determine the magnitudes of the normal and friction forces exerted on the crane by the level ground. 

(b) Determine the magnitudes of the normal and friction forces exerted on the caisson by the level ground.

Strategy: To do part (a), draw the free-body diagram of the crane and the part of its cable within the dashed line.

Answer 1

N_crane = 196.9 kN, Fcrane = 0.707 kN

N_caisson = 3.22 kN, F_caisson = 0.707 kN.