FYKOS Year 26 Series 5 Problem 4 — don't move · FYKOS 26 #26.5.4
Physics · mechanics
Problem
A block of wood or other material placed in front of a wheel is often used to prevent an airplane from moving (see picture). Can such a locking device prevent an airplane from moving even if its engines are on and producing maximal power? Analyze this problem and show how does the answer depend on the material of the wheels, the ground, and the locking device. Will your answer change if the height of the locking device is such that the point of contact with the wheel is at its very top?