The gravitron is a ride where people are spun around in an enclosed chamber. The First Law of Motion says that a person in the gravitron will tend to travel in a straight line unless something forces him to change direction. In this case, the wall of the room pushes in on the person, causing them to accelerate centripetally. If they spin fast enough, the maximum force of static friction between a person and the wall becomes large enough to hold them in place on the wall against gravity. Imagine a gravitron that spins around 0.44 times per second. People feel pressed against the wall 3 meters from the center of the chamber. How fast are people moving as the chamber turns

Atennis player used a tennis racket to hit a tennis ball with a mass of 0.25 kg with a force of 5.25 newtons. how does the force the tennis racket exerted on the tennis ball compare with the force the tennis ball exerted on the tennis racket? a. the force of the tennis racket on the tennis ball is equal in magnitude and opposite in direction to the force the tennis ball exerted on the tennis racket. b. the force of the tennis racket on the tennis ball is equal in magnitude and in the same direction as the force the tennis ball exerted on the tennis racket. c. the force of the tennis racket on the tennis ball is less in magnitude and in the same direction as the force the tennis ball exerted on the tennis racket. d. the force of the tennis racket on the tennis ball is greater in magnitude and opposite in direction as the force the tennis ball exerted on the tennis racket.