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A man runs towards a mirror at a speed of 15 m/s. what is the speed of this image. (1) 7.5 m/s. (2) 15 m/s. (3) 30 m/s. (4) 45 m/s. |
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Answer» Answer is (2) 15 m/s. Given : we know that at every instant of time, the image of man will be as far away as the man is in front. Therefore the rate of change of distance of image is same as that of the object (man). Hence the speed of the image is 15 m/s. towards mirror. |
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