A gun fires a bullet of mass 50 gm with a velocity of 30 m/s. Because of this the gun is pushed back with a velocity of 1 m/s. The mass of the gun is

Options :
  1. 1.5 kg
  2. 15 kg
  3. 20 kg
  4. 30 kg
Answer and Explanation :-

Answer: Option 1

Explanation:

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My theory is that hope is a form of madness. A benevolent one, sure, but madness all the same. Like an irrational superstition--broken mirrors and so forth--hope's not based on any kind of logic, it's just unfettered optimism, grounded in nothing but faith in things beyond our control.
-Benjamin Wood The Bellwether Revivals