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bjarnidk
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Homework Statement
A thin, uniform metal bar, 2.00 m long and weighing
90.0 N, is hanging vertically from the ceiling by a frictionless
pivot. Suddenly it is struck 1.50 m below the ceiling by a small
3.00-kg ball, initially traveling horizontally at 10 m/s The ball
rebounds in the opposite direction with a speed of 6 m/s
(a) Find the angular speed of the bar just after the collision.
(b) During the collision, why is the angular momentum conserved
but not the linear momentum?
Homework Equations
L = Iw
F = dP/dt
The Attempt at a Solution
I tried various ways to equate the momentum of the ball to the angular momentum of the rod but it just won't work. I've been at this problem for 8 hours straight and I can barely think anymore. Please help me.
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