a bullet of 10mg is fired
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D – 500 m/s
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Explanation–
According to the law of conversation of mass–
- The momentum of gun = The momentum of the bullet
[ Momentum = Mass × Velocity]
[ We know that 10 g = 0.01 Kg ]
{ Let the velocity of bullet be x }
- 1 Kg × 5 m/s = 0.01 Kg × x m/s
- 5 = 0.01 × x
- x = 5/0.01
- x = 5 × (100/1)
- x = 500 m/s
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