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Q.

A man runs towards a plane mirror with a speed of 10 m/s. The speed of the image with respect to man is

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a

5 m/s

b

25 m/s

c

20 m/s

d

10 m/s

answer is C.

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Detailed Solution

Keeping the plane mirror at rest if the object moves towards the mirror with a speed ‘υ’, the speed of image w.r.t object
= 2υ
= 2 x 10 = 20 m/s

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