Physics Crossword

2. anything that flows
4. the tendency of an object to rest or move
7. in proportion to something else
10. the force felt between two surfaces when one attempts to slide against the other
11. the force by which a planet or other body draws objects toward its center
12. a force that acts in the opposite direction to an action force
15. intrinsic property of a body
18. m/s
19. the sum of all the forces acting on an object
20. the speed of something in a given direction

1. a unit of mass for the metric system.
3. when two values change in opposite directions, so that if one is doubled the other is reduced to one half
5. energy exerted or brought to bear
6. reciprocal action or influence.
8. increase in the rate or speed of something
9. an object's resistance to a change in motion.
13. the comparison of two different quantities which have different units
14. the quantity of motion of a moving body, measured as a product of its mass and velocity.
16. the magnitude of the change of its position over time
17. force per surface area