# Physics

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A bullet with a mass of 10 imbeds itself in a wooden block of mass 3990g and is free to move. If the speed of the block and bullet together is 50 cm/s just after the impact what was the original speed of the bullet ?

• Physics -

Use conservation of momentum:

m1*v1 = m2*v2

Where m1 and v1 are the mass and speed of the initial system, m2 and v2 are the mass and speed of the final system

10*v1 = (10+3990)*50

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