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The track near the top of your favorite roller coaster has a circular shape with a diameter of 36 m. When you are at the top, you feel as if you weigh only one-fifth of your weight on the ground. What is the speed of the roller coaster?

  • Physics -

    apparent weight= 1/5 mg

    but apparent weight= weigh-centripetalforce
    1/5 mg= mg-mv^2/r

    solve for v

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