3. Box of mass 2.5 kg meets a spring when it is travelling 1.2 m/s. After the box contacts the spring, the spring compresses to a maximum of 5.0 cm at which point the box is travelling on a friction surface. The work done by the friction is -0.50 J. a. (5 points) What is the spring constant of the spring? b. (5 points) What is the coefficient of kinetic friction between the box and the rough surface?
v = 1.2 m/s
m=2.50 kg
Friction surface