| A | B |
|---|
| net force | the combination of forces acting on an object |
| ______ depends on net force | Acceleration |
| What must you do to increase acceleration of an object? | you must increase the net force acting on it |
| What does ~ stand for? | "is directly proportional to" |
| When surfaces slide or tend to slide over one another, the force of _____ acts | friction |
| What is always in the direction of opposing motion? | direction of friction force |
| The direction of the friction force is always in a direction _____ | opposing motion |
| In some cases, _____ friction os somewhat greater than ______ friction | static / sliding |
| _____ is the measure of the inertia of a material object | mass |
| Earth, or its weight, is usually expressed in _____ | pounds |
| In most of the world, the measure of matter is commonly expressed in a mass unit, the _____ | kilogram |
| In metric units, the unit of force is the _____ | newton |
| 1 kilogram = _____ pounds | 2.2 |
| What is Newton's Second Law of Motion? | The acceleration of an object is directly proportional to the net force acting on the object, is in the direction of the net force, and is inversely proportional to the mass of the object |
| The acceleration of an object is always in the direction of _____ | net force |
| inertia is a _____ to acceleration | resistance |
| The acceleration due to gravity is symbolized by _____ | g |
| We use the symbol ___, rather than ___, to denote that acceleration is due to gravity alone | g, a |
| When acceleration terminates, we say that the object has reached its ______ | terminal speed |
| If we are concerned with direction, down for falling objects, we say the object has reached its _______ | terminal velocity |
