2.0 x 103 kg roller coaster car travels around a 24 m radius vertical loop. The tangential speed of roller coaster car is 18 m/s at the lowest point of the loop. Determine the normal force exerted on the roller coaster car by the track at this point.

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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.