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  • Sep 24, 2017, 08:29 AM
    Further mechanics
    In a rollercoaster, for a passenger to remain in contact with his seat, the centripetal force must equal the weight. Why is this?
  • Sep 25, 2017, 04:41 AM
    Yes, well actually centripetal force must be less than the person's weight for him to remain in his seat. I think it's better to think about this in terms of acceleration: at the top of an arc of the roller coaster the centripetal acceleration downward of the coaster must be less than gravitational acceleration in order to stay in the seat.

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