A cannon ball is fired with a velocity 200 m/sec at an angle of 60° with the horizontal. At the highest point of its flight it explodes into 3 equal fragments, one going vertically upwards with a velocity 100 m/sec, the second one falling vertically downwards with a velocity 100 m/sec. The third fragment will be moving with a velocity
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Momentum of ball (mass m) before explosion at the highest point 
= 
= 
Let the velocity of third part after explosion is V
After explosion momentum of system = 
= 
By comparing momentum of system before and after the explosion
⇒ ⇒ 
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