1. The problem statement, all variables and given/known data Ok so I had this problem on my quiz today and I am really anxious to see if i got it right. It went something like this: You have a frictionless horizontal platform and a ramp with kinetic friction of 0.3. The ramp is 20 degree of the ground. A 2 kg block/object is launched by a spring with k=1000 N/m at the beginning of the horizontal ramp. The spring is stretched back 20 cm. So the idea is that it is launched on the horizontal platform before eventually going up the ramp. use 9.8 for g. 2. Relevant equations I used KEi + PEi - Wfriction = KEf+PEf 3. The attempt at a solution I basically found the KE due to the spring to be 20N. Then using that i calculated work lost due to friction. P. Energy at top of ramp = mgh. so i solved for h. I got h=.7385 Everything made sense when i did it. I don't know if that's right though.