A 500 g cart is released from rest 1.0 m from the bottom of a frictionless, 30 degree ramp. The cart rolls down the ramp and bounces off a rubber block at the bottom. The figure shows the force during the collision. Here's what I did. Which is probably wrong for the very first part so I'll only show my work for first part: [tex]\[ v^2_f = v^2_i + 2ad \] \[ v^2_f = 0+ 2(0.5)(gsin30)(1)\] so \[v_f = 2.21 m/s \] [/tex] I took the area of the graph as [tex]\ [J=200\times26.7\times10^-^3\times0.5\][/tex] So can somebody please help with the first part, I don't understand.