George and Fred are having a tug-o-war. George pulls the rope with a force of 52.1N and Fred pulls against George with a force
of 12.2N. If the rope has a mass of 5.9 how fast is it
accelerating?

Suppose a force of 60 n is required to stretch and hold a spring 0.1 m from its equilibrium position. a. assuming the spring obeys hooke's law, find the spring constant k. b. how much work is required to compress the spring 0.5 m from its equilibrium position? c. how much work is required to stretch the spring 0.6 m from its equilibrium position? d. how much additional work is required to stretch the spring 0.1 m if it has already been stretched 0.1 m from its equilibrium? a. kequals 600