A railroad car of mass 2.5 x 104 kg is moving at a speed of 4.00 m/s.  It collides and couples with three other coupled railroad cars, each with the same mass as the single car, moving in the opposite direction at 2.00 m/s.  (a) What is the speed of the four coupled cars after the collision? (b) How much energy is lost in the collision?

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A: Let mass of B = m Mass of A = 5 m Using conservation of momentum 0 = mu + (5m)Vu = -5 V ...(1)Using…

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A: m1 = 1 kg v1 = 2 m/s m2 = 1 kg v2 = 0 m/s Kinetic energy lost = 0.8 J

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A: thank you

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A: According to conscurection of momentumP1 = Pfmv = m vb A c + M vpAc       = m (0.506 v) + M vpAc…