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renaldocoetz
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Homework Statement
A thin rod of length 1,5m is oriented vertically, with its bottom end attached to the floor by means of a frictionless hinge. The mass of the rod may be ignored compared to the mass of an object fixed to the top of the rod. The rod, starting from rest, tips over and rotates downward.
a) what is the angular speed of the rod just before it strikes the floor?
b) What is the magnitude of the angular acceleration of the rod just before it strikes the floor?
Homework Equations
[tex]\omega[/tex] = [tex]\theta[/tex]/t
[tex]\theta[/tex] = s/r
The Attempt at a Solution
if the rod rotates from vertical to flat on the floor then the angular displacement must be 90/57,3 right? 1,57 rad
not sure how to get the time interval though
please help