I'd like to begin by ignoring friction and center of gravity at the moment if that is possible...and throw out any other variables until I get the larger picture down and then I'd like to ask for a discussion including those items..... The picture shows a block moving towards a ball...similar to a putter getting ready to strike a ball. The putter has and angle to it and when it strikes the ball I'd like to be able to calculate the reflection angle of the ball. Did I do this correct? Thanks.