Space Time & Motion A.3 Work Energy and Power (id: a1f14c675)

本题目来源于试卷: Space Time & Motion A.3 Work Energy and Power，类别为 IB物理学

[单选题]
An object is released from rest from a very high building. Air resistance is not negligible. Which of the following graphs shows the variation of the gravitational potential energy of the object with time?

A.
B.
C.
D.


参考答案:  D


本题详细解析:
Expianation:

$\Delta E_p=mg\Delta h$

Due to downward acceleration due to gravity, the rate of decrease of gravitational potential energy with time must increase – slope must become steeper. After the object reaches terminal velocity, the rate of decrease of gravitational potential energy is constant.

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