A String Is Tied to a Doorknob 0

question 55

Multiple Choice

A string is tied to a doorknob 0.72 m from the hinge as illustrated in the figure.At the instant shown, the force applied to the string is 5.0 N.What is the magnitude of the torque on the door?

• A)2.1 N . m
• B)3.0 N .m
• C)1.0 N . m
• D)0.78 N . m
• E)0.60 N . m

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Definitions:

Pulmonary Semilunar

A term typically referring to the pulmonary semilunar valve, which is a valve of the heart situated between the right ventricle and the pulmonary artery, regulating blood flow to the lungs.

Right Ventricle

The lower right chamber of the heart that pumps oxygen-depleted blood to the lungs for oxygenation.

Pulmonary Trunk

A major blood vessel that carries deoxygenated blood from the right ventricle of the heart to the lungs for oxygenation.

Cushion the Heart

Likely refers to the protective layer around the heart, such as the pericardial fat or the pericardium, but without specific context, the term is ambiguous.