A Playground Merry-Go-Round Has a Radius R and a Rotational

question 19

Multiple Choice

A playground merry-go-round has a radius R and a rotational inertia I.When the merry-go-round is at rest, a child with mass m runs with speed v along a line tangent to the rim and jumps on.The angular velocity of the merry-go-round is then:

• A)mv/I
• B)v/R
• C)mRv/I
• D)2mRv/I
• E)mRv/(mR² + I)

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Definitions:

Bag-mask Device

A hand-held device used to provide ventilation to a patient who is not breathing or who is breathing inadequately. It consists of a self-inflating bag, a valve, and a face mask.

Endotracheal Tube

A flexible tube inserted through the mouth or nose into the trachea to establish an airway for the administration of anesthesia or mechanical ventilation.

Cardiopulmonary Resuscitation

An emergency procedure combining chest compressions with artificial ventilation to manually preserve brain function until further measures to restore spontaneous blood circulation and breathing in a person who is in cardiac arrest.

Do-not-resuscitate Order

A legal document signed by a patient or healthcare proxy indicating that no resuscitative efforts should be made in the event of cardiac or respiratory arrest.