1.Two cars collide at an intersection and stick together. Car A, with a mass of 1200 kg , was going east at vA = 25 m/s before the collision while car B, of mass 1600 kg , was going north at vB = 16 m/s . What is the speed of the cars after the collision?   2.A head-on, elastic collision between two particles with equal initial speed v leaves the more massive particle (mass m1 ) at rest. The less massive particle has mass m2 . Find the ratio of the particle masses. Then find the final speed of the less massive particle.

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