An object moves with `5ms^(-1)` toward right while the mirror moves with `1ms^(-1)` toward the left as shown in Figure. Find the velocity of image.

Explanation

Take `rarr` as `+` direction
`v_(i)-v_(m)=v_(m)-v_(0)`
`rArr v_(i)-(-1)=(-1)-5`
`:. v_(i)=-7 m//s`
`rArr` 7 m/s and direction towards left.