The discussion centers on the direction of reaction forces in roller and pin supports, specifically addressing why reaction forces can act both upwards and downwards depending on the configuration. Participants clarify that a roller can support forces perpendicular to its surface, while a pin can exhibit downward forces when positioned between two surfaces. The ambiguity in the figures referenced contributes to confusion regarding the mechanics involved, particularly in determining the direction of these forces.
PREREQUISITESStudents in engineering mechanics, structural engineers, and anyone studying the behavior of forces in mechanical systems will benefit from this discussion.
why The pin would be the one with the downward force?? i thought the support is 'stucked' betwwen 2 surfaces so , depending on the situations , there will be times that the force act downwards , and also there will be time that the forces act upwardsAndrewHolowack said:
You seem to have answered your own original question here. Do you still have a question regarding no. 4?werson tan said:
The "rocker" can be thought of as a section of a roller pinned to the end of the rod, so same result as no 3.werson tan said:
