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Rainbow Child
Jan24-08, 09:09 PM
P: 365
My English are pretty poor! I will try again to explain.
  • From the conservation of momentum you can find the velocity [itex] V_A[/itex] of M, in terms of the velocity v of m.
  • From the conservation of energy for the mass M, from A to B, you can find the velocity [itex]V_B[/itex] in terms of [itex]V_A[/itex], i.e. in terms of v.
  • Now demanding [itex]V_B=0[/itex] in order the pendulum barely swings you can calulate v.

Does it makes any sence?