t=2*V0/(7g*mu), mu the friction coefficient

t=2V0/(7gmu), mu the friction coefficient

送交者: gyro 于 2009-09-13, 17:43:35:

回答: 这问题本来就是问你的，小抠的力学还得再学十年才能分析这些身边的小问题。由 @ 于 2009-09-13, 13:07:33:

dv/dt=-g*mu
I*d(omega)/dt=mg*mu*R
v is the translation motion velocity, omega the angular velocity, I the inertia of rotation. For a ball, I=2mR**2/5.

when it becomes a pure rolling motion, v=R*omega.

Solve these equations, t=2V0/(7g*mu)

所有跟贴:

加跟贴