Normal force: The ground exerts a normal force on the pyramid, which is equal in magnitude to the gravitational force acting on the pyramid, but in the opposite direction.
Wind force: The wind exerts a force on the pyramid, which can vary in magnitude and direction depending on the weather conditions.
Seismic forces: Seismic forces are caused by earthquakes, and can cause the pyramid to vibrate or shake.
Internal stresses: The pyramid is made up of large blocks of stone, which are held together by gravity and friction. Over time, the weight of the pyramid can cause the stones to shift or crack, creating internal stresses.