F9RK. Upr. 17, Problem 3

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Uploaded: 20.11.2016
Content: Ф9РК. Упр. 17, задача 3.rar (6,1 kB)

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3. The boy weighing 50 kg, running at a speed of 5 m / s, jumping on a cart weighing 100 kg, moving at a speed of 2 m / sec. How fast will move after that wagon?

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