English: [1] Forces on a particle on a smooth slope. There is a the force due to the weight of the particle (vertical) and the reaction of the slope on the particle (if the particle had spacial dimensions, these two forces would not be collinear and hence a torque would develop). [2] Using a parallelogram, these forces are added vectorially, showing the resultant (double arrow) force. [3] This resultant force will causes the particle to accelerate down the slope, as we expect.
{{BotMoveToCommons|en.wikipedia|year={{subst:CURRENTYEAR}}|month={{subst:CURRENTMONTHNAME}}|day={{subst:CURRENTDAY}}}} == {{int:filedesc}} == {{Information |description={{en|1=[1] Forces on a particle on a smooth slope. There is a the force due to the we