A Person Standing on Top of a 40-M High Cliff

question 66

Multiple Choice

A person standing on top of a 40-m high cliff throws a rock with a mass of 0.25 kg off the cliff.The rock leaves the person's hand with a speed of 11 m/s and makes an angle of 75 degrees above the horizontal.What is the speed of the rock when it hits the ground at the bottom of the cliff?

• A)26 m/s
• B)28 m/s
• C)30 m/s
• D)49 m/s
• E)52 m/s

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Definitions:

Epinephrine

A hormone and neurotransmitter also known as adrenaline; involved in regulating heart rate, blood vessel and air passage diameters.

Thyroid Hormones

Chemical substances produced by the thyroid gland, such as triiodothyronine (T3) and thyroxine (T4), crucial for regulating metabolism, growth, and development.

TSH

Thyroid Stimulating Hormone, a pituitary hormone that stimulates the thyroid gland to produce thyroxine, which in turn regulates metabolism.

Negative Feedback

A regulatory mechanism in biological and mechanical systems where the output of a process is fed back in a manner that reduces the fluctuations in the output.