... motion. The centripetal force is the force needed to move an object in a circle at constant speed. * The smaller the mass, the bigger the centripetal force. The smaller the velocity of the object, the less centripetal force you will have to apply. * The smaller the length of rope (radius), the more centripetal force you will have to apply to the rope. * The centripetal force and the centripetal acceleration are always pointing in the same direction. Aim: To investigate the factors which affect the speed of an object travelling in a circular path. Prediction: I predict that the smaller the mass, the smaller the centripetal force will be. The smaller the velocity of the object, the less centripetal force we will have to apply. If the plastic tube moves in a small circle, the greater the radius and therefore the less centripetal force we will have to apply to ...

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