Physics Unit 5 = Forces

3. The ratio of the frictional force to the normal force (three words).
8. This physical quantity is a force, not a mass.
9. Friction associated with resting (you need to overcome this to start moving).
10. The Greek letter used to represent the coefficient of friction.
11. The ________ force is a term used to describe the final force, the difference between opposing forces.
13. It's the unit of mass in the English/Imperial/Customary system.
14. It's the unit of force in the English system.
15. It's the unit of mass in the metric system.
17. This force is the component of weight (the gravity force) that makes an object want to roll down an incline.

1. Friction associated with motion.
2. When there's no acceleration in a problem (aka constant speed) you set a = _________.
4. You draw this before solving the problem; it illustrates the forces involved in the situation (three words).
5. It's the unit of force in the metric system.
6. This force is opposite the object's motion, caused by the surfaces in contact with each other.
7. It's another word for perpendicular in math and physics.
12. The coefficient of friction does not have a _____.
16. The weight of an object (force from gravity) is only equal to the normal force on this type of surface.