Determine kevins speed just before he grabbed his brother

Reference no: EM13507532

Kevin has a mass of 81.2-kg and is skating with in-line skates. He sees his 15.4-kg younger brother up ahead standing on the sidewalk, with his back turned. Coming up from behind, he grabs his brother and rolls off at a speed of 2.79 m/s. Ignoring friction, find Kevin's speed just before he grabbed his brother.

Reference no: EM13507532

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