The discussion revolves around the direction of reaction forces in the context of rollers and pins, specifically addressing the mechanics of how these supports interact with surfaces. Participants are examining the conditions under which reaction forces may act upwards or downwards.
The discussion is ongoing, with participants actively questioning the assumptions about the direction of forces. Some have acknowledged potential misunderstandings regarding the figures, while others are seeking clarification on specific cases without reaching a consensus.
There are mentions of unclear figures and varying interpretations of the mechanics involved, which may be influencing the discussion. Participants are also reflecting on the conditions that could lead to different force directions based on the setup of the roller or pin.
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:
