A Rock Is Dropped from the Top of a Vertical

question 53

Multiple Choice

A rock is dropped from the top of a vertical cliff and takes 3.00 s to reach the ground below the cliff.A second rock is thrown vertically from the cliff,and it takes this rock to reach the ground below the cliff from the time it is released.With what velocity was the second rock thrown,assuming no air resistance?

• A) 4.76 m/s upward
• B) 5.51 m/s downward
• C) 12.3 m/s upward
• D) 4.76 m/s downward
• E) 12.3 m/s downward

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Definitions:

Innate Capacity

Describes abilities or instincts that a person is born with, rather than skills developed through learning or experience.

Infant-Directed Speech

Uses shorter words and sentences, higher and more varied pitch, repetitions, a slower rate, and longer pauses; also known as motherese.

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Disequilibrium

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