In the Figure, the Horizontal Lower Arm Has a Mass

question 85

Multiple Choice

In the figure, the horizontal lower arm has a mass of 2.8 kg and its center of gravity is 12 cm from the elbow joint pivot. How much force F_M must the vertical extensor muscle in the upper arm exert on the lower arm to hold a 7.5 kg shot put?

• A) 100 N
• B) 500 N
• C) 750 N
• D) 1000 N
• E) 1500 N

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Definitions:

Obsessive-compulsive Disorder

A mental disorder characterized by recurring, unwanted thoughts (obsessions) and repetitive behaviors (compulsions) that the individual feels compelled to perform.

Major Depressive Disorder

A disorder related to mental health, defined by a continuous experience of feeling down or a diminished pleasure in tasks, resulting in major interference with daily routines.

Generalized Anxiety Disorder

A mental health disorder characterized by persistent and excessive worry about a number of different things.

Manic Episode

A period of abnormally elevated mood, energy, and activity levels, often characteristic of bipolar disorder.