HW32#1 – 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 rope is used to pull a 3.57 kg block at constant speed 4.86 m along a horizontal floor. The force on the block from the rope is 7.94 N and is directed 16.0° above the horizontal.

(a) What is the work done by the rope’s force?
(b) What is the increase in the thermal energy of the block–floor system?
(c) What is the coefficient of kinetic friction between the block and floor?