本题目来源于试卷: gc physics textbook chapter 6 problems，类别为 IB物理学
[问答题]
Describe the energy transformations that take place when a skier startsy7 w19b f7usrzuvkh( r-tk/g9;v te-g sk)z/fmqdm3qs/h69fm h iing down a hill, but after a time is brought to rest by striking a snowdriftmq)sfmh 93q/6h f/ dmz.
参考答案: As the skier goes
down the hill, the gravitational PE is transformed mostly into kinetic energy,
and small amount is transformed into heat energy due to the friction between
the skis and the snow and air friction.
As the skier strikes the snowdrift, the kinetic energy of the skier
turns into kinetic energy of the snow (by making the snow move), and also into
some heat from the friction in moving through the snowdrift.
本题详细解析:
暂无
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