A crate of mass 10kg is placed on a ramp elevated at 30 degrees from the horizontal. The ramp is 2m long. The coefficient of static friction is .4 and coefficient of kinetic friction is .3. At the low end of the ramp and oriented parallel to it is a spring pre compressed by string by 5cm. The spring constant is 30 kN/m.
A) How much more will the spring be compressed when the crate stops moving down the ramp?
B) How far up the ramp will the spring send the crate?