A uniform, 4.5 kg, square, solid wooden gate 1.5 m oneach side hangs vertically from a frictionless pivot at the center of itsupper edge. A 1.1 kg raven flying horizontally at 5.0 m/s flies intothis door at its center and bounces back at 2.0 m/s in the oppositedirection.(a) What is the angular speed of the gate just after it is struckby the unfortunateraven? (b) During the collision, why is the angularmomentumconserved but not the linear momentum?

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A uniform, 4.5 kg, square, solid wooden gate 1.5 m on
each side hangs vertically from a frictionless pivot at the center of its
upper edge. A 1.1 kg raven flying horizontally at 5.0 m/s flies into
this door at its center and bounces back at 2.0 m/s in the opposite
direction.
(a) What is the angular speed of the gate just after it is struck
by the unfortunate
raven? (b) During the collision, why is the angular
momentum
conserved but not the linear momentum?

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