A Stationary 1

question 43

Multiple Choice

A stationary 1.67-kg object is struck by a stick.The object experiences a horizontal force given by F = at - bt²,where t is the time in milliseconds from the instant the stick first contacts the object.If a = 1500 N/(ms) and b = 20 N/(ms) ²,what is the speed of the object just after it comes away from the stick at t = 2.74 ms?

• A) 3.3 m/s
• B) 22 m/s
• C) 3.7 m/s
• D) 25 m/s

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Definitions:

Anterior Horn

The front section of the spinal cord's grey matter, containing cell bodies of motor neurons.

Arbor Vitae

A term meaning "tree of life," referring to the cerebellar white matter's branched, tree-like appearance in the human brain, critical for coordinating movement.

Midbrain

A portion of the brainstem involved in vision, hearing, motor control, sleep/wake, arousal (alertness), and temperature regulation.

Pineal Gland

A small endocrine gland in the brain that produces melatonin, a hormone that regulates sleep patterns.