A bullet embededs itself in a rod 3/4 the way up the rod from its hinge(hinge is

Question

A bullet embededs itself in a rod 3/4 the way up the rod from its hinge(hinge is 2m off ground and rod is at rest above the hinge). The rod then rotates downward around the hinge, as it becomes perpindicular to the ground it collides ellastically with an object(block). (block is at rest on ground below the hinge)

Given: Length of rod is 2m, mass of rod & object is 3kg, mass of bullet is .007kg, initiall velocity of bullet is 320m/s

a)What is the angular velocity of rod before and after collision of bullet?

b)angular velocity of rod before and after collision with object?

c)Torque rod after bullet collision?

d)Velocity of object (after collision)?

e)Force of the rod on object?

Explanation / Answer

a) apply conservation of angular momentum about pivot end

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