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a bullet of mass m1 =5g is moving with speed v1. it strikes a block of...

a bullet of mass m1 =5g is moving with speed v1. it strikes a block of mass m2=6 kg that is hanging at rest from a cord. the bullet embeds itself into the block and the bullet and block swing up on the cord , coming to rest at a height h=2 cm above the original position of the block. whatbisnthe correct expression for momentum conservation when the bullet strikes the block?
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