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标题: [求助]motion under gravity [打印本页]

作者: kurtlau 时间: 2004-4-4 05:23
标题: [求助]motion under gravity

A ball is thrown vertically upwardws with a speed of 42m/s.Find where it is after 5s and the total distance it has actually traveled.If it falls past the point of projection into a well of depth 70m,find when it strikes the bottom.

thanks~~

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