| A | B |
|---|
| motion | The state in which one object's distance from another is changing. |
| speed | The distance an object travels in one unit of time. SPEED = Distance/Speed |
| velocity | When you know both the speed and direction of an object's motion, you know the ________ of the object. |
| acceleration | refers to increasing speed, decreasing speed, or changing direction. |
| formal acceleration | final velocity - initial velocity devided by time |
| force | A push or pull exerted on an object. |
| Unbalanced forces | acting on an object will change the object's motion. |
| Balanced forces | Equal forces acting on an object in opposite directions- will result in no change in motion. |
| inertial | The tendency of a moving object to continue in a straight line or a stationary object to remain in place. |
| Newton's First Law | an object at rest will remain at rest and an object that is moving at constant velocity will continue moving at constant velocity unless acted upon by an unbalanced force. |
| formula for force | mass x acceleration |
| Newton | A unit of measure that equals the force required to accelerate one kilogram of mass at a rate of one meter per second per second. |
| formula for acceleration | force divided by mass |
| accereration is dependent on | on the force acting on it and the object's mass. |
| friction | A force that one surface exerts on another when the two rub against each other. |
| the force of the friction depende on | the types of surfaces involved and how hard the surfaces push together |
| gravity | The force that pulls objects toward each other. |
| projectile | An object that is thrown. |
| air resistence | The fluid friction experienced by objects falling through air, an upward force. |
| weight | is a measure of the force of gravity on an object, and mass is a measure of the amount of matter in that object. |
| formula for weight | mass x acceleration due to gravity |
| The law of universal gravitation | states that the force of gravity acts between all objects in the universe. Any two objects in the universe, without exception, attract each other |
| Newton's 3rd law | if one object exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction on the first object. |
| formula for momentum = | mass x velocity |
| law of conservation of momentum | The total momentum of any group of objects remains the same unless outside forces act on the objects |
| centripetal force | A force that causes an object to move in a circle. |
