I'm pretty sure that's what I did for b. I did 1/2mv^2 + umgcos30*d = mgh. With units, I came up with 10v^2 + (.2)(20)(9.8)(cos30)(6)=(20)(9.8)(6sin30), and came up with v = 6.2. Now I'm not sure how I apply this to question a, for how far the spring is compressed when v = 0?
Yeah after...
A 20 kg mass is released from rest at the top of a plane inclined at an angle of 30 degrees. At the bottom of the plane lies a spring with a spring constant of 200 N/m. The distance between the mass and the spring is 6 m, and the coefficient of sliding friction is .2. I have to answer a...