Yeah! Thank you!haruspex said:Sorry, I got confused. I thought you were asking about the acceleration of the wedge.
For the block, there is a horizontal component of the normal force slowing the horizontal component of the block's velocity, while in the vertical direction there is the block's weight and the vertical (upward) component of the normal force. The weight has the greater magnitude, so the vertical velocity also reduces.
And there will be no violation of momentum conservation in x direction but in y direction we cannot apply this law because there is mg and by the way we don’t have to.kuruman said:In that case you cannot conserve momentum along the x-direction because the component of the weight in your chosen x-direction is an external force acting on the block.