本题目来源于试卷: gc physics textbook chapter 6 problems，类别为 IB物理学
[问答题]
Suppose you lift a suitcase from the floor to a table. The work you do on the;r 2*u-l x8spu8 hlv zv28qjio stjxl, 1i6q:y3lt e(b/1xtdp ahep(2 c uitcase depends on which of the following: (a) whether you lift it straight up ox ( b:dqj1t21e(/i,lex phtyc3l6p tar along a more complicated path, (b) the time it takes, (c) the height of the table, and (d) the weight of the suitcase?
参考答案: The work done to lift the suitcase is equal to the change in PE of the suitcase, which is the weight of the suitcase times the change in height (the height of the table). (a) Work does NOT depend on the path, as long as there are no non-conservative forces doing work. (b) Work does NOT depend on the time taken. (c) Work DOES depend on the height of the table – the higher the table, the more work it takes to lift the suitcase. (d) Work DOES depend on the weight of the suitcase – the more the suitcase weighs, the more work it takes to lift the suitcase.
本题详细解析:
暂无
| 
