Relative motion in rain: A man runs eastward while rain falls vertically — from which apparent direction does the rain seem to come? Assume still air aloft; runner’s speed is horizontal toward the east. Choose the correct option.
IIT JEE
Physics
Difficulty: Easy
Choose an option
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AFrom the west
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BFrom the east (slanted toward his face)
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CFrom the north
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DFrom the south
Answer
Correct Answer: From the east (slanted toward his face)
Explanation
Relative velocityApparent rain velocity = vrain − vrunner. With vrain vertical and vrunner eastward, the apparent direction is tilted, coming from the east.
Final AnswerFrom the east (slanted toward his face)