The figure shows two particles moving across a horizontal surface without friction. The first has a mass m1 = 50 gr and a speed u1= 8 m / s  . The second has a mass m2 = 80 gr and a speed u2= 2 m / s. Determine: a) The speed of each particle after an elastic collision if the first one travels from left to right and the second from right to left. b) The speed of each particle after an elastic collision if both travel from left to right. c) The speed that both particles acquire if both remain united after the shock

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