Un niño de 25 kg corre por un jardín con una velocidad de 2.5 m/s de forma que su trayectoria es tangente al borde de un carrusel de 500 kg•m2 de momento de inercia y un radio de 2 m, que está parado. el niño salta sobre el carrusel y lo pone en movimiento. determina la velocidad angular del niño y del carrusel cuando se mueven juntos.

grupo de opciones de respuesta:

0.25 rad/s

5 rad/s

0.208 m/s

0.208 rad/s

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