When a man and plane mirror both move towards each other at the rate of 10 m/s. At what rate the image approach the man ?
A. 10 m/s
B. 20 m/s
C. 30 m/s
D. 40 m/s
A. 10 m/s
B. 20 m/s
C. 30 m/s
D. 40 m/s
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Correct Answer – C
When a person moves towards a mirror with velocity v, his image approaches the mirror with the same velocity v and the image approaches the person with a velocity 3v.
Thus, velocity of image `= 3v = 3 xx 10 = 30 m//s`