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An object is falling vertically downward...

An object is falling vertically downwards with velocity `10m//s`.In terms of`hat i and hat j` find the image velocity. M

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The correct Answer is:
A, C
Image speed will also be `10m//s`. Further, image velocity will make same angle `(=60^(@))` from the mirror on opposite side of it.
In terms of `hati hat j`,
` v_1=10cos 30^(@) hati+10 sin 30 ^(@)hat j`
` v_(I)=(5sqrt(3)hat i + 5 hatj)m//s`.
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