An Object Is Dropped from Rest into a Pit,and Accelerates

question 19

Multiple Choice

An object is dropped from rest into a pit,and accelerates due to gravity at roughly 10 m/s2.It hits the ground in 5 seconds.A rock is then dropped from rest into a second pit,and hits the ground in 10 seconds.How much deeper is the second pit,compared to the first pit? Neglect air resistance.

• A)four times deeper
• B)two times deeper
• C)three times deeper
• D)five times deeper

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Definitions:

Electroencephalograph

An instrument used to record the electrical activity of the brain, typically through electrodes placed on the scalp.

Deep Sleep

A stage of sleep that involves the slowest brain waves during the sleep cycle, crucial for physical renewal and healing.

Beta Pattern

A pattern of brain wave activity with a frequency range of about 12-30 Hz, associated with wakefulness, alertness, and active concentration.

Delta Pattern

A type of brain wave that is associated with deep sleep and is characterized by low frequency and high amplitude.