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Question

An observer moves towards a stationary plane mirror at a speed of 4 ms1. What is the relative speed of the image with respect to the observer?

A
2 ms1
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B
4 ms1
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C
8 ms1
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D
the image will stay at rest
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Solution

The correct option is C 8 ms1


velocity of object with respect to mirror, vo,m=4m/s=dxdt taking right direction as positive .

velocity of image with respect to mirrot, vi,m=dxdt=dxdt=4m/s since x=x

Now, vi,o=vi,m+vm,o=vi,mvo,m

vi,o=4(4)=8m/s

Answer-(C)

829129_524053_ans_6a938b5c9ed24da29829df1fcc6d752e.jpg

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