A small car with mass of 0.800 kg travels at a constant speed on the inside of a track that is a vertical circle with radius 5.00 m. If the normal force exerted by the track on the car when it is at the bottom of the track is 25 N, a) What is the normal force on the car when it is at the () top, (i) rightmost and (ii) leftmost point of the track? b) What is the speed of the car as it travels around the vertical circle?

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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.