Forces and Motion

1. The pivot point of a lever is called a _________.
5. A ________ is a push or pull that may cause an object to move, stop, or change directions.
6. A tug of war in which the rope does not move is an example of _____________ forces.
9. If the object's weight is greater than the ___________ force, the object sinks.
10. A planet with more mass will have a greater ________________ pull.
13. The location of an object in space.
14. The distance an object travels in a certain amount of time.
15. Newton's first law of motion states that no acceleration can happen without a _______.
19. Rock climbers like to use chalk dust to increase the __________ force of their grip.
20. A change in __________ always results from an unbalanced force.
21. According to Newton's second law of motion, force = _________ x acceleration.
22. A ________ is a simple machine that works by changing the direction of a force.

2. A lawn mower is an example of a ____________ machine.
3. An object's ___________ is its speed and its direction.
4. The _______________ of all forces acting on an object is called the net force.
7. Astronauts in orbit seem to be weightless but actually _________ carries the shuttle forward so they are accelerating.
8. In science, work is using a force to move an object through a __________.
11. According to Newton's third law of motion, if you push a chair with your hand, it is called the _________ force.
12. The rate at which velocity changes.
16. Simple machines _________ the amount of force needed to work.
17. ____________ is a property of motion that describes how hard it is to slow down or stop an object.
18. Objects can speed up as they fall due to __________.