Question

In the figure below, two long barges are moving in the same direction in still water, one with a speed of 10 km/h and the other with a speed of 20 km/h. While they are passing each other, coal is shoveled from the slower to the faster one at a rate of 1100 kg/min. How much additional force must be provided by the driving engines of each barge if neither is to change speed? Assume that the shoveling is always perfectly sideways and that the frictional forces between the barges and the water do not depend on the weight of the barges.

_____N (faster barge)

______N (slower barge)

Answer 1

Bey Nentors ged lane ope, b - - DPbic where bo from Newton's ard lam ca coal dm - loo kglasa - 18-333 kyle. Ne,bao ( for coal sielative to slow targe) Neid (20-100 km/h (For coal relative to faster bange) It 2.472 x (18-333) = 50.92N Fadditional - 50-92 N F -ON (faster bange) I-50192.1 Slower bange 2