P. 4256. A rubber cord is stretched out between two walls. At the point of the cord C a force of F along the direction of the cord is exerted.
a) What is the displacement of point C if the cord can be characterized with a spring constant D?
b) At which point of the cord must the force F be exerted when the displacement of C is the greatest?
Data: F=5 N, a=40 cm, b=10 cm, .