本题目来源于试卷: gc textbook chapter 2 Kinematics in One Dimension，类别为 IB物理学
[问答题]
An object that is thq3j(r*9) 9eot(c owqkxvn0qs rown vertically upward will return to its oril5s:uj/( ph+,o7 /uf -u qagxlz )vxcbginal position with the same speed as it had initially if air resistance is negligible. If air resistance is appreciable, will this result be altered, and if so, how? [Hint: The acceleration due to air resistance is always in a direction opposite to the motion.]-5oc) +fg uzq,vsxhlb 7uxj( //pul:a
参考答案:
As
an object rises WITH air resistance, the acceleration is larger in magnitude
than g, because both gravity and air
resistance will be causing a downward acceleration. As the object FALLS with air resistance, the
acceleration will be smaller in magnitude than g, because gravity and resistance will be opposing each other. Because of the smaller acceleration being
applied over the same distance, the return speed will be slower than the launch
speed.
本题详细解析:
暂无
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