A roller coaster car rolls down a frictionless track, reaching speed ν at the bottom.a. If you want the car to go twice as fast at the bottom, by what factor must you increase the height of the track?b. Does your answer to part a depend on whether the track is straight or not? Explain.

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Centripetal Force

A particle, body, object or certain mass while travelling in a rotational path or semicircular path, experiences an inertia force. If that inertia force pulls the towards the inward of the imaginary circle in the rotation, it is termed as centripetal force.