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dttah
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Homework Statement
"A bar line AB has a length of 1,5m and a mass of 0,5kg.
It is stuck in the point B in a horizontal fixed hub, and it can oscillate freely with no friction in the verical plane.
at time t=0, the bar line, which was still (not moving, inertia), is set free to rotate.
When it reaches the vertical position it hits a body of mass m2 = 0,2kg.
The bar line immediately stops, while the body m2 begins to move after the collision with a horizontal velocity.
Find: The angular velocity of the bar line, the linear velocity of its free extreme point (so A, i guess), and the velocity of m2 after the collision.
Homework Equations
We have then:
AB = 1,5m
m1 = 0,5kg
m2 = 0,2kg
v0 = 0m/s
The Attempt at a Solution
Alright, I didn't do too much actually, I am just starting out with these kind of problems.
I understand that as soon as the bar line is set free, it starts a circular motion, and the final velocity depends on the gravity acceleration ( I guess ). And that the impact will be at angle teta = pi/2.
Now, I don't really know where to start from.
I am thinking about finding the center of mass, is that the right path to begin with?