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Question
A man runs towards a stationary mirror at a speed 15 m/s. The speed of the image relative to the man is
A man runs towards a stationary mirror at a speed 15 m/s. The speed of the image relative to the man is
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Solution
The correct option is B 30 ms−1
Given that speed of the man is 15 m/s
The image in the plane mirror runs as fast as the man when viewed by a third person.
As the image and the man run in opposite directions, speed gets add up.
But speed with respect to man is 15−(−15) = 30 m/s
Given that speed of the man is 15 m/s
The image in the plane mirror runs as fast as the man when viewed by a third person.
As the image and the man run in opposite directions, speed gets add up.
But speed with respect to man is 15−(−15) = 30 m/s