Seven friends compete in a tug of war. A group of four friends pulls the rope to the right while the other three pull to the left - see picture. The right group pulls with forces of 20 N, 80 N, 40 N, and 60 N, and the left with forces of 60 N, 80 N, and 80 N. Which group acts with greater force on the rope and by how much?
Pulling a rope. The forces are not drawn to scale!
