Purpose: Displacement Constant Length Measured Position Determine the relationship between the displacement of a spring and the force exerted by the spring. Force (N) Hooke’s Law Distance (m) F = -kx http://image.mustangmonthly.com/f/28225112/mump_1008_10_o+macpherson_strut_system+complete_installation.jpg http://i01.i.aliimg.com/photo/v0/271712415/car_spring.jpg F x Title: Coefficient of Friction NORMAL FORCE FRICTION Weight Purpose: Find a relationship between the Normal Force and the Frictional Force. Do this for both wood on wood and wood on felt. DO NOT STRETCH THE SPRING MORE THAN 70 CM!