A ball attached to the end of a string is swung around in a circular path of radius r. If the radius is kept constant and the speed is doubled     1 the centripetal acceleration increases by a factor of 2. 2 the centripetal acceleration increases by a factor of 4. 3 the centripetal acceleration remains the same 4 the centripetal acceleration decreases by a factor of 4

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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.