A 12-Kg Crate Rests on a Horizontal Surface and a Boy

question 37

Multiple Choice

A 12-kg crate rests on a horizontal surface and a boy pulls on it with a force that is 30° below the horizontal.If the coefficient of static friction is 0.40, the minimum magnitude force he needs to start the crate moving is:

• A)44 N
• B)47 N
• C)54 N
• D)56 N
• E)71 N

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Definitions:

Cerebellum

A part of the brain located at the back of the skull, crucial for coordination, precision, and timing of movements.

Cerebrum

The largest part of the brain, responsible for voluntary activities, speech, sensation, vision, hearing, thought, and memory.

Reticular Formation

A network of nerve pathways in the brainstem involved in consciousness and the regulation of sleep-wake cycles.

Selectively Attending

The process by which individuals focus on specific stimuli while ignoring others, allowing them to navigate and process information in a complex environment effectively.