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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

A

`(5sqrt(3)hat i - 5 hatj)m//s`

B

`(5sqrt(3)hat i + 5 hatj)m//s`

C

`(sqrt(3)hat i + 2 hatj)m//s`

D

none

Text Solution

Verified by Experts

The correct Answer is:
B

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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Knowledge Check

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