Across
- 2. attached to something that doesn't move.
- 4. machines that combine two or more simple machines
- 6. a grooved wheel with a rope, chain, or cable running along the groove.
- 8. a machine that can do work in a single movement
- 10. consist of an axle attached to the center of a larger wheel so that the wheel and axle rotate together.
- 11. a piece of wood, metal, or material thicker at one end than the other.
Down
- 1. a system of fixed and moveable pulleys
- 3. when one end of the rope is fixed and the other wheel is free to move.
- 5. a bar that is free to pivot around a fixed point called a fulcrum.
- 7. an inclined plane wrapped in a spiral around a cylindrical post.
- 9. a sloping surface that reduces the energy necessary to do work.