Consider a classic wedge and block system, (block on top of wedge(inclination theta)). there is friction between the block and wedge (not enough to prevent block from sliding). All other surfaces are smooth. For the motion that follows after releasing the block from rest, is momentum in the horizontal direction conserved?
There is no exact formula for momentum conservation but I guess p1=p2 in general
The Attempt at a Solution
Momentum is conserved when net external force is zero. Since friction is an internal force here momentum conservation should be applicable along x axis but it seems counter-intuitive so I'm just confirming