Aperson is standing on a level floor. his head, upper torso,
arms and hands together weigh 438n and have a centerof gravity that
is 1.17m above the floor. his upper legsweigh 144n and have a
center of gravity that is 0.835m above thefloor. finally, his lower
legs and feet together weigh 87nand have a center of gravity that
is 0.270m above the floor. relative to the floor, find the location
of the center of gravityfor the entire body.

In an old-fashioned amusement park ride, passengers stand inside a 3.0-m-tall, 5.0-m-diameter hollow steel cylinder with their backs against the wall. the cylinder begins to rotate about a vertical axis. then the floor on which the passengers are standing suddenly drops away! if all goes well, the passengers will “stick” to the wall and not slide. clothing has a static coefficient of friction against steel in the range 0.60 to 1.0 and a kinetic coefficient in the range 0.40 to 0.70. part a what is the minimum rotational frequency, in rpm, for which the ride is safe? express your answer using two significant figures. f f = rpm