A diving board of uniform density is supported by two fixed rods at points $P$ and $Q$. A person stands at the end $R$ of the diving board, as shown. The forces from the rods acting on the board are vertical. The board stays in equilibrium while the person moves slowly from $R$ towards point $Q$. Which row shows how the magnitudes of the forces from the rods on the board change?
Physics 9702 · AS & A Level · Equilibrium of forces