System is shown in fig. and wedge is moving toward left with speed `2ms^(-1)`. Find the velocity of the block B.

Explanation

There will not be any change in segment lengths `II,III, IV and VI`.

The change in segment length I= `-x_(A)`
The change in segment length V= `x_(A)`
The change in segment length VII= `y`
Net change in segment lengths should be zero
`-x_(A)+x_(A)+y=0 implies y=0`
Therefore, block B will not move w.r.t. wedge A. Hence, velocity of B and A should be same.