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 *)fn6u jy h0-obw)(8 jftoumw h 7vpw1from t4 pu/gjb2ff3vf 0:pcb/v e)kwz 8mq: whe floor to a table. The work you do on the suitcase depends on which of the following: (a) whether you lift it straight up or along a more/8/)gcw : 0b:3v fz4fb2pw juqpvfm ke 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.
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