Question
Mon February 18, 2013 By:

A man is running towards a plane mirror at the rate of 2m/s. With what speed is he approaching his own image?

Expert Reply
Mon February 18, 2013
The speed of the image is 2m/s. But he is approaching his own image with the speed of (2 + 2) = 4 m/s. His own speed + the image speed = 4m/s. This is because he already is moving with the speeed of 2m/s, so it adds to the image speed.
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