In the Figure, the Horizontal Lower Arm Has a Mass

question 6

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 FM 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:

Preoperational Intuitive

A stage in Piaget's theory of cognitive development where children aged 2-7 years exhibit thinking based on intuition and superficial appearances rather than logic.

Religious Thinking

A cognitive process that involves beliefs, practices, and moral values related to a sense of connection with a higher power or the divine.

Tangible Details

Specific, concrete elements or facts that can be observed and measured, often enhancing the realism or credibility of a description or story.

Authoritative Parents

Parents who are firm, setting clear and consistent limits, but who try to reason with their children, giving explanations for why they should behave in a particular way.