Forces and Simple Machines
Across
- 3. friction can cause a moving object to slow down, speed up, or _______.
- 6. force that resists the movement of object against each other
- 9. on the door knob we put the effort on the _______ so the axle can have greater force
- 10. an example of lever second class and has one wheel
- 12. block and tackle is a combination of ______ pulley and moveable pulley
- 14. pulley is a simple machine that has a ______ wheel with a rope
- 16. gears are wheels and axles with "________" that work together
- 19. a push or a pull
- 20. an object that is not moving is at _____
- 21. the weight of the object being moved
- 22. the _______ class of lever has an effort between the fulcrum and the load
Down
- 1. a change in position
- 2. the ability to do work
- 4. something to cut
- 5. an inclined plane is a flat _______ surface
- 7. a rod
- 8. an object to make work easier
- 9. _______ is made up of one or more inclined planes used to force materials apart
- 11. _______surfaces like rock and sand create much more friction
- 13. a bar/ beam that turns on a point.
- 15. work is done when a force moves an object over a _______
- 16. the inclined plane on the screw is called the ______
- 17. the force that you apply to cause a simple machine to do work
- 18. force that pulls all objects toward the center of the earth
- 19. the point that supports the bar on lever