A Man at Point a Directs His Rowboat Due North

question 4

Multiple Choice

A man at point A directs his rowboat due north toward point B, straight across a river of width 100 m. The river current is due east. The man starts across, rowing steadily at 0.75 m/s and reaches the other side of the river at point C, 150 m downstream from his starting point.
-What is the speed of the river?

• A)0.38 m/s
• B)0.67 m/s
• C)1.1 m/s
• D)6.7 m/s
• E)7.5 m/s

---

Definitions:

Mood Disorders

A group of mental health conditions characterized by significant alterations in a person's mood, such as major depressive disorder or bipolar disorder.

Dopamine

A neurotransmitter involved in reward, motivation, and motor control within the brain.

Norepinephrine

A neurotransmitter and hormone involved in arousal and alertness, as well as in the stress response.

Serotonin

A neurotransmitter that contributes to feelings of well-being and happiness, playing a key role in regulating mood, appetite, and sleep.