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a toy moves on a horizontal surface with a speed of 3m/ makes 8 turns in 5 seconds,whats the diameter of the wheel?

  • physics -

    C = πd m
    8 turns is thus 8πd m
    since it takes 5 seconds, the speed is

    8πd m/5 s = 3 m/s
    d = 15/8π

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