Recent content by Willy_Kingston

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    Work/Kinetic energy, running a race with mass and speed

    Homework Statement You run a race with your friend. At first you each have the same kinetic energy, but then you find that she is beating you. When you increase your speed by 21%, you are running at the same speed she is. If your mass is 81 kg, what is her mass? Your mass: 81kg Your speed is...