Human centrifuges are used to train military pilots and astronauts in preparation for high-g maneuvers. A trained, fit person wearing a g-suit can withstand accelerations up to about 9g (88.2 m/s2) without losing consciousness.   (a) If a human centrifuge has a radius of 4.87 m, what angular speed (in rad/s) results in a centripetal acceleration of 9g? rad/s=   (b) What linear speed (in m/s) would a person in the centrifuge have at this acceleration? m/s=

A speed skater increases her speed form 10 m/s to 12.5 m/s over a period of 3 seconds while coming out of a curve of 20 m radius. What are the magnitudes of her radial, tangential and total accelerations as she leaves the curve?

A disk of radius 2.25 m rotates about its axis. Points on the rim of the disk undergo tangential acceleration of magnitude 1.81 m/s?. At a particular time, the rim has a tangential speed of 1.67 m/s. At a time 0.867 s later, what is the tangential speed v of a point on the rim, the magnitude of the point's radial acceleration a,, and the magnitude of its total acceleration Arot? U = m/s ar = m/s? Atot = m/s?

A maintenance man is twirling a set of keys on the end of a lanyard. If the keys have a centripetal acceleration of 145 m/s² and the lanyard is .15 meters long, what is the tangential speed of the keys? 12.