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

question 24

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:

Stimulant

A substance that increases levels of physiological or nervous activity in the body, often used to increase alertness or physical performance.

Smoking-Related Illness

Health conditions that are directly caused or exacerbated by tobacco use, including lung cancer, heart disease, and chronic obstructive pulmonary disease (COPD).

Neurotransmitters

Biochemicals, released from a sending neuron, that transmit messages to a receiving neuron in the brain and nervous system.

Norepinephrine

Neurotransmitter that is involved in the regulation of mood.