A 500 kg truck moving at 30 ms strikes a parked 300 kg car they connect together and move forward What is the speed of the car and truck as they move forward connected together after the collision?

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It depends on their initial speeds and masses. The speed can be worked out by: mcarucar + mtruckutruck = mbothvboth where u = initial veloicty m = mass v = final veloicty remember u and v are vectors so will have direction! So: 300 * 0 + 500 * 30 = (300 + 500) * v v = 30 * 500 / 800 = 18.75 or "19 m/sec" to two sig figs.

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