作者cvsi04236 (ＢＢ小Ｂ)
看板Physics
标题[问题] 大一普物的计算题
时间Mon Oct 11 18:31:35 2010
problem 1. Find the equation of motion for a particle of mass m attached on
a spring with spring constant k.
problem 2. Find the velocity v(t) if the drag force D=bv2 acting on a body
falling in air with v0=0 and y0=0. What is the terminal speed vT? Find what is
the velocity v(t) for small t ?
problem 3.A massless rope is tossed over a wooden dowel of radius (r) in
order to lift a heavy object of weight (W) off of the floor . The coefficient
of sliding friction between the rope and the dowel is (u) . Show that the
minimum downward pull on the rope necessary to lift the object is
(pi)(u)
F = We
down
这是我们某某物理教授所出的问题 但是有牵扯到微积分
希望板上神人可以帮忙解一下....
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※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 140.116.102.104
1F：→ hank780420:课本应该有导出可以给你代数据的通式 10/11 18:34
2F：→ hank780420:还有第一题高中就该看过了吧? 10/11 18:34