4. The drawing shows a version of the loop-the-loop trick for a small car. If the car is given an initial speed of v= 4.8 m/s, what is the largest value that the radius r can have if the car is to remain in contact with the circular track at all times? m

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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.