Recent content by kiwimia

I can't agree with you more on all real forces should be shown on free body diagrams. I think the book is showing a different way and it's because the D' Alembert's Law is applied, which is the law of reaction forces, and the law for displacement variables. That was why I added the pseudo force...

The vertical forces on the mass (the weight Mg and the upward forces exerted by the frictionless bearings) have been omitted because these force are perpendicular to the direction of motion. Only the horizontal forces are considered. The original question description is stated as the...

1. Relevant information This is a two-block-system on top of each other to the right side of a wall, both attached with springs that are also attached to the wall. A force is applied on the bottom block to the right direction, frictions occurred on both bottoms of the two blocks. Here is the...