A ball is tied to a string and whirled in a horizontal circle at a constant 4 revolutions per second. Categorize the following according to whether they are 0 in value, constant in value, or change:
The velocity of the ball is constantly changing because its direction is changing. The acceleration of the ball is constant and perpendicular to the velocity, towards the center of the circle. The force is also in this direction and constant. The displacement after one complete revolution is 0.
