Forces in Action

4. the force that stops something from moving on a surface
6. a force that makes an object move more slowly as it moves through the air
7. a rod used for lifting something by placing one end of it under the load, and pushing down on the other end
11. a piece of equipment with parts that work together to do a particular task
13. the force that attracts objects in space towards each other
14. examples include the lever, wheel and axle, pulley, inclined plane, wedge, and screw
15. a wheel or set of wheels over which a rope is pulled in order to lift a load

1. a force that makes an object move more slowly as it moves through the water
2. a flat surface tilted at an angle used to help raise or lower a load
3. something that increases the effect of a force
5. the point on which a lever turns
8. an effect that causes things to move in a particular way
9. how heavy something is
10. the quantity of material that something contains (measured in grams)
12. a source of power, such as fuel, used for driving machines, providing heat, etc.