Question

stand on a rotating platform and use the hula hooping motion of hips to generate rotation Explain the total body rotation results,

Answer 1

When a person stand on rotating platform and use the hula hoop the person's body rotates at constant angular velocity with rotating platform then the person inside of the hoop moves their body to propel the hoop around them, they are exerting an upward force (from their hips) and a turning force known as torque. Torque is a twisting, outward force that is basically needed to cause the hoop to spin. (More technically, torque is needed to keep the hoop spinning because it is needed to keep the centripetal force going.) Another force involved in the hula hooping process is friction. Friction between the hoop and the hula hooper’s clothes and the air will slow the hoop’s spinning down. However, friction also helps to keep the hula hoop up on the hula hooper’s body while the force of the hula hoop’s mass pulls it down (this downward force is due to gravity). The heavier (more massive) the hoola hoop, the greater the downward force and the more work it takes to keep the hula hoop spinning.the body of person rotating with hula hoop spinning.