A ball of mass 100gm and another ball of 120gm moves towards each other with the speed of 6 m/s and 5m/s respectively. if they stick to each other after colliding, what will be the velocity of combined mass after the collision.
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we know that it is a perfect inelastic collison,the velocity after colliding is
v=m1u1+m2 u2/m1+m2
here m1=100g u1=6m/s
m2=120g u2=-5m/s(since both are moving in opposite direction)
v=100(6)+120(-5)/100+120
=600-600/220
=0
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