Plane mirror is moving towards you at 5 ...

Plane mirror is moving towards you at 5 cm`//`s. You can see your image in it. So at how much speed image moves towards you ?

5 cm`//`s

2.5 cm`//`s

10 cm`//`s

7.5 cm`//`s

Text Solution

Verified by Experts

The correct Answer is:

A, C

Velocity of mirror towards the person,
`vec(v_0)=5hati cm//s`
Velocity of image towards the person,
`vec(v_i)=-5 hati cm//s`
`therefore` Velocity of image with respect to person,
`vec(v_(i0))=vec(v_i)-vec(v_0)=-5hati-5hati=-10hati`
`therefore|vec(v_(i0))|=10" "cm//s`

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