An object is moving towards a mirror wit...

An object is moving towards a mirror with a velocity of `10 ms^(-1)` as shown in the figure. If the collision between the mirror and the object is perfectly elastic, then the velocity of the image after collision with mirror in vector form is

`-10 hat(j)`

`-10 cos 15 hat(j) + 10 sin 15 hat(j)`

`-10 hati`

`-10 cos 30 hat(j) - 10 sin 30 hat(i)`

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