pfautz+lab+15

Centripetal Force Lab





1) Circular motion at constant speed is not a natural state of motion because velocity includes speed and direction, unlike speed, and the object is constantly changing direction. 2) We call the change in motion per unit time impulse. Newton’s second law adequately expresses its relationship with a net force. 3) Acceleration is the force that is directed towards the center of circular motion.
 * Preliminary Questions:**

1) The tension of the string provides the centripetal force needed to keep the stopper moving in a circle. 2) The force is pointing in the direction toward the center of the circle. 3) If you increase the speed of the revolution of the stopper, the force needed to keep the stopper moving around also increases. 4) If the speed of revolution is doubled, the centripetal force should be four times greater since the velocity is squared.
 * Analysis Questions:**

1) Static friction provides the centripetal force needed for a car to go around a circular off-ramp at constant speed. 2) If a car tries to go around a circular off-ramp curve at a speed which required a centripetal force greater than what the road can provide, the car will continue on its path and run off the road. 3) If a car doubles its speed on a circular off-ramp, four times as much centripetal force will be required for it to make the turn
 * Application:**