Identify the following simple machines. Write A for lever, B for pulley, Cfor wheel and axle, D for inclined plane, E for wedge, and F for screw. 6. stairs 7. ax - 1. Knife 2. Wheelbarrow 3. Pliers 4. Windlass 5. Seesaw 8. flagpole 9. doorknob 10. escalator