Abullet with a mass of 5.00 x 10^-3 kg is loaded into a gun. the loaded gun has a mass of 0.52 kg. the bullet is fired, causing the empty gun to recoil at a speed of 2.1 m/s. what is the speed of the bullet?

The solution to the problem is as follows:

mass of the bullet * velocity of the bullet = mass of the gun * velocity of the gun

0.005 kg * v = 0.52 kg * 2.1 m/s 
-> v = (0.52kg * 2.1 m/s) / 0.005 kg = 218.4 m/s 

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