Two Cars are traveling toward each other. Car A mass = 5 KG. Car B mass = 6 KG. Car A is traveling at 3 m/s. Car B is traveling at 6 m/s. After impact, Car B continues to move on at 1 m/s. What is Car A's velocity after the impac
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ANSWERS: 3
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First, find the net inertia of the system. Then, subtract from it the final inertia. Energy present in the system cannot change, so they should be equal.
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Law of conservation of momentum. A_mass * A_rightwards_velocity_before + B_mass * B_rightwards_velocity_before = A_mass * A_rightwards_velocity_after + B_mass * B_rightwards_velocity_after 5 * 3 + 6 * -6 = 5 * x + 6 * -1 Solve for x. This colision is not elastic: Energy is lost in the form of heat when two cars collide, so you can't use the conservation of energy (except to work out the heat generated!)
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Hint, if the collision is head on, and B is still moving forward, the velocity of A will not only decrease, it will be (not positive, but. . . ). . .? And it does not involve Romaine lettuce.
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