HW32#7 – A block of mass slides head into a spring of spring. When the block stops, it has compressed the spring…

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

In the figure below, a block of mass m = 2.0 kg slides head into a spring of spring constant k = 320 N/m. When the block stops, it has compressed the spring by 9.5 cm. The coefficient of kinetic friction between the block and floor is 0.35.

(a) While the block is in contact with the spring and being brought to rest, how much work is done by the spring force?

(b) What is the increase in the thermal energy of the block–floor system?

(c) What is the block’s speed just as it reaches the spring?