Laws of Motion Review

3. the average location of the mass of a system
4. Gravity, electromagnetic, weak and strong nuclear forces are the four ___ forces
8. transfer of energy
10. an attractive force that occurs between all objects that have mass
13. This type of contact force is caused by contact of surfaces. It will either slow down or oppose motion and it will turn motion into heat
14. How many laws of motion are there?
16. For every action force, there is an equal and opposite reaction force. Forces are always paired.
17. Forces are always paired into these two
18. a pull or push that is applied to an object
19. the rate at which distance is traveled
20. a change in velocity over time
21. the unit of mass is grams and the unit of force is ___

1. the amount of space between one point and another
2. States that the greater the force, the greater the acceleration. The greater the mass, the greater the force needed for the same acceleration
5. the distance traveled by an object divided by time it traveled
6. If vector arrows are in opposite directions, do you add or subtract?
7. a vector quantity that indicates both the rate at which displacement changes and the direction of motion
9. a physical quantity that has magnitude but no direction
11. This is when the forces are not equal and/or are not opposite in direction. The net force will not equal zero and there is change in motion.
12. Another name for the law that states that an object at rest stays at rest or an object in motion stays in motion (in the same direction, at the same speed) unless acted upon by an outside force
15. These types of forces are equal in size and in opposite directions. The net force is zero. There is no change in motion.