Centripetal Force. Today you are going to study an object that moves in a circle. An object that moves in circular motion must have a force acting on it that is directed toward the center of the circle. This could be something as simple as a string pulling a ball into circular motion.
when a car is at the top of the loop,
the track is actually pushing it downward toward the center of the circle
in which it is travelling at that moment.
centrifugal forces are not real.
show that it satisfies
Newton’s Second Law:
The apparatus you will use is shown below.
One radian is the angle subtended at the center of a circle by an arc equal in length to the radius of the circle.
2p segments gets completely around.
1 rev = 3600 = 2p radians (rad)
w = 2p/t
a = w2R
where R is the radius of the circle.
For your lab exam, you must know this method of
determining the centripetal force.