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Sophie
Sophie asked in Science & MathematicsPhysics · 3 years ago

A bicycle wheel, with a diameter of 85 cm, rotates four times per second. Determine the speed of a point on the rim?

3 Answers

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  • RealPro
    Lv 7
    3 years ago

    ...

    Do you know what pi is?

    Circumference of circle = pi * diameter.

    The circumference of a circle is the length around the circle.

    If it rotates 4 times in a second, you find speed by multiplying circumference with 4...

    makes sense?

    The answer will be in cm/s.

    To convert it to m/s you can divide with 100.

  • John
    Lv 7
    3 years ago

    tangential speed (cm/s) = radius (cm) x rotation rate (rad/s)

  • Anonymous
    3 years ago

    point travels 4 x 85 pi cm /sec

    approx 1068.5 cm per sec

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