Arace car has a centripetal acceleration of 15.625 m/s2 as it goes around a curve. if the curve is a circle with radius 40 m, what is the speed of the car?

Un jugador de beisbol batea un foul recto en el aire.la pelota deja el bate con una rapidez de 120 km/h. en ausencia de resistencia del aire. ? cual sera la rapidez de la pelota cuando la atrape el catcher

Could someone me find the answer to this problem.

Explain earth's motion, using the terms "precession" and "rotation" in your answer.