An object is approaching a fixed plane mirror with velocity \( 5 \mathrm{~m} \mathrm{~s}^{-1} \)...

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An object is approaching a fixed plane mirror with velocity \( 5 \mathrm{~m} \mathrm{~s}^{-1} \) making an angle of \( 45^{\circ} \) with the normal. The speed of image w.r.t. the mirror is
(1) \( 5 \mathrm{~m} \mathrm{~s}^{-1} \)
(2) \( 5 / \sqrt{2} \mathrm{~m} \mathrm{~s}^{-1} \)
(3) \( 5 \sqrt{2} \mathrm{~m} \mathrm{~s}^{-1} \)
(4) \( 10 \mathrm{~m} \mathrm{~s}^{-1} \)
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