answer
1. inclined plane, pulley
2. wheelchair ramp, slide
3. sails on sailboats are raised and lowered using pulleys, flagpoles use pulleys in order to hoist the flag up or to bring it down.
4. seesaw, trolly the fulcrum is the wheel
5. light bulb, water bottle cap
6. knife, axe
7. Ferris wheel, bike wheel
