Task 30968.

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The boy, whose mass is 40 kg, on a sled pulled off with an icy hill height of 5 m. At its base, he collided with another boy on a sled with a mass of 50 kg, kativshimsya a speed of 6 m / s perpendicular to the first. After the collision, they rolled together. What is the amount of kinetic energy lost in the collision? Massa sleds and neglect friction.

Detailed solution shorthand terms, formulas and laws used in the decision, the withdrawal of the calculation formula and the response.
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