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Conservation of Energy?

  • #1

Homework Statement


Two heavy balls of equal mass M are attached to the long but light metallic rod standing
on the floor. The rod with the balls falls to the floor. Find the velocity of each ball at the moment
when the rod hits the ground. Neglect mass of the rod and the friction between the balls and the
floor.



Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
169
0
Conservation of linear momentum may help. Friction is negligible, conservation of energy may also be of help.

A question: Can you explain why reaction force (by the ground) on the ball, touching ground at all moments, does no work on the two-ball system!
 
Last edited:
  • #3
PhY
38
0
Equations for Velocity:

1)F=Ma ->
f(a) => V=u+at
2)F=M(v-U)/t

ft=m(V-u)
ft/m+u=V
V=u+ Ft/m
 
Last edited:

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