Question

Hello, I have a question pertaining to a hw problem. A block is sent up a frictionless ramp along which an x-axis extends upward. Figure 7-31 gives the kinetic energy of the block as a function of po

sition x; the scale of the figure's vertical axis is set by Ks=40.0J . If the blocks initial speed is 4.00 m/s what is the normal force of the block (chp 7 problem# 20)