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You are driving your race car around a circular test track.W

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/08/29 22:29:01
You are driving your race car around a circular test track.Which would have a greater effect on the magnitude of your acceleration,doubling your speed or moving to a track with half the radius?Why?
你在弧形测试赛道上开着赛车,如何获得更大的加速效果?
A、增大两倍的速度;B、开到只有原来一半半径的赛道上
为甚么?
a=V^2/R
aA=4a原
aB=2a原
可知,增大两倍的速度对加速度的影响比轨道半径减半要好