Why isn’t the reaction force perpendicular in this case?Watch
Horizontally, the wall would have to push back to stop the climber swinging through the wall.
So it must be diagonally as it has both a horizontal and vertical component.
The reaction is perpendicular in simple cases like a stationary block on a flat surface. The reaction only counters the weight in that case.
On Q9, I tried resolving forces (assuming that R was perpendicular to the wall) to get the answer but i got the wrong answer. Then by moments I get the right answer. And after reading part b and the answer, the reaction is said to be at 60° to the vertical, but I thought reaction force was always perpendicular to the surface the object is acting on? I’ve attached the question and my working out as well as the solution.