歡迎來到Yogi老師解題給你看,今天我要講解的是AP Physics C Mechanics的問題

A block is sent up a frictionless ramp along which an x axis extends upward. The figure below gives the kinetic energy of the block as a function of position x; the scale of the figure’s vertical axis is set by Ks = 38.0 J. If the block’s initial speed is 4.35 m/s, what is the normal force on the block?