Question | Answer |
The total momentum of any group of objects remain the same unless outside forces also act on the objects. | Law Of Consevation of momentum |
Force | a push or pull that gives energy to an object. |
forces are measured in Newtons ; N | Units Of Forces |
Net Forces | total of all the forces acting on an object. |
The tendency of matter to resist a change in its motion. | Inertia |
Balanced forces | The net force acting on an object is zero |
Unbalanced Forces | the net force acting on an object is not zero. |
magnitude | the amount (size) of a measurements. |
Friction | a forcethat one surface exerts on another when the two surfaces are in contact with each other. |
Static friction | friction between un moving objects |
Kinetic friction | friction between moving objects |
Sliding friction | friction between objects that slide ( rub ) against each other. |
Rolling friction | occurs when an object rolls over a surface |
Fluid friction | occurs when an object moves through a fluid or a gas. |
New First Law Of Motion | Objects at rest will stay at rest and objects in motion will stay in motion at a constant velocity unless acted on by an unbalnced force. |
Newtons Second Law Of Motion | The net force acting on an object is equal to the product of the objects mass and acceleration. |
Newtons Third Law Of Motion | For every action force there is a reaction force that is equal but acts in the opposite direction. |
Law Of Universal Gravitation | all objects in the univers are attracted to each other; strengh of attraction demends on the objects masses and distance from each other. |
Freefall | The motion of an object when gravity is the only force acting on it. |
Terminal Velocity | Greatest velocity of a falling object; occurs when the force of gravity is equal to the force of friction |
Weight | A measure of the force of gravity on an object. |
Mass | The amount of matter in something. |
Centripetal Force | The force thats pulling on an object in circular motion towards the center of the circle. |
Geosynchronous Orbit | Occurs when the object orbits another object at a rate equal to teh 2nd objects rate of rotation. |