Centripetal force is the force that is required to keep an object moving in a circular path. It acts towards the center of the circle and is necessary to counteract the centrifugal force that would otherwise cause the object to fly off in a straight line.
In a loop the loop, centripetal force is provided by the normal force exerted by the track on the object as it moves along the circular path. This normal force acts in the opposite direction to the object's weight, providing the necessary centripetal force to keep it moving in a circular path.
The speed of the object, the radius of the loop, and the mass of the object all affect the amount of centripetal force needed for a successful loop the loop. The greater the speed, the smaller the radius, and the greater the mass, the more centripetal force is required.
If there is not enough centripetal force in a loop the loop, the object will not be able to maintain a circular path and will fly off in a straight line. This could result in the object crashing or falling off the track.
Yes, it is possible for centripetal force to be greater than the weight of the object in a loop the loop. This is because the normal force provided by the track can be greater than the weight of the object, resulting in a greater centripetal force and allowing the object to successfully complete the loop.