HW32#2 – A skier leaves the end of a ski-jump ramp with a velocity directed 25° above the horizontal.

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 69 kg skier leaves the end of a ski-jump ramp with a velocity of 25 m/s directed 25° above the horizontal. Suppose that as a result of air drag the skier returns to the ground with a speed of 23 m/s, landing 17 m vertically below the end of the ramp. From the launch to the return to the ground, by how much is the mechanical energy of the skier–Earth system reduced because of air drag?