1. The problem statement, all variables and given/known data Using the Principle of Conservation of Energy, solve: A block of mass 5kg is released from rest and slides down a distance D down a smooth plane inclined at 30◦ to the horizontal. It then strikes a spring compressing it 10cm before it begins to move up the plane. If the spring constant is 980N/m and g = 9.8m/s2, find D. 2. Relevant equations mgh=0.5(k)(x^2) d=hcos(theta) 3. The attempt at a solution Using mgh=0.5(k)(x^2) 5(9.8)h=0.5(980)(.01)^2 and got h on its own for: h=0.001 Then I used d=hcos(theta) to get: d= (.001)cos(30) d= 8.66×10^-4 Is this the correct way of doing the question? Thanks for any advice.