Riders on a carousel rotate in a horizontal circle of radius 3.0m at an angular speed of 0.80rad/s. A rider holds a small ball at arm’s length and notices that, relative to her, the ball tends to move directly outward.
(a) Is the rider’s rotating frame inertial or non-inertial?
(b) Name the additional force that must be included in a force diagram drawn in the rider’s frame and give its magnitude in terms of the ball’s mass m.