A 445-N Weight Is Hung on a Spring Scale, and the the Scale

question 87

Multiple Choice

A 44.5-N weight is hung on a spring scale, and the scale is hung on a string. The string is lowered at a rate such that the entire assembly has a downward acceleration of 4.90 m/s². The scale reads

• A) 0 N.
• B) 22.2 N.
• C) 44.5 N.
• D) 66.7 N.
• E) 71.2 N.

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Definitions:

Subscapularis

A muscle in the shoulder that assists in rotating the arm and stabilizing the shoulder joint.

Teres Major

A muscle located in the upper arm that assists in the rotation and adduction of the arm.

Shoulder Level

A reference point used in medical and fitness contexts to describe the height or area around the shoulders of a human body.

Pectoralis Major

A large muscle in the upper chest that aids in the movement of the shoulder and the arm.