谁能帮我解下这题？错了又被发回来了

q小屁孩p · 发表于 2012-5-24 14:43:12

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A stationary member of a marching band tosses a 2.0foot long balanced baton straight up into the air and then begins walking forward at 4 mph .At a particular moment ,the baton is 20feet in the air and is falling back toward the earth with a velocity of 30ft/sec.the tip of the baton is rotating at 140rpm in the orientation shown.
1.What is the absolute velocity of the baton tip with respect to the ground ?
2.What is the relative velocity of the baton tip with respect to the band member?

憨吃迷糊睡 · 发表于 2012-5-26 12:27:04

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[求助解答] 谁能帮我解下这题？错了又被发回来了

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