1. The problem statement, all variables and given/known data A 945N resistance force is overcome with a 13.5N effort using a screwdriver whose handle is 24mm in diameter. What is the pitch of the screw? 2. Relevant equations Given: r = 24mm FE = 13.5N FR = 945N Pitch = ? r is radius FE is force effort FR is resistance force Pitch is unknown spacing of screw Basic equation: FR * pitch = FE * 2pi * r 3. The attempt at a solution Working equation Pitch = (FE * 2pi * r) / FR Substitution Pitch = (13.5N * 2pi * 24mm) / 945N Pitch = 2.154mm yet the answer is said to be 1.08mm which is exactly half of my initial answer. Is there something I am missing?