How physics works when falling ELASTIC ball hits 45 degree slope? At point of colision what forces are working? As do I believe- in time delta t- one force as moment was straght with y axis(prependicular to ground) and Normal force( or how do u call it) witch is prependicular to 45 degree slope? And then sum of vectors would be parallel to x axis? How?? When moment after colision would be also parallel to x axis? And speed before colision and after would be same? How to show this in equations hm?