Question | Answer |
Momentum | The product of an object's mass and its velocity |
Formula for Momentum | m=pv |
Law of Conservation of momentum | The total momentum of any group of objects remains the same unless outside forces also act on the object |
Force | A push or pull that gives energy to an object |
Units of Force | Forces are measured in Newtons;N |
Net Force | total of all the forces acting on an object |
Inertia | The tendency of matter to resist a change in its motion |
Balanced Force | The net force acting on an object is zero |
Unbalanced Force | the net force acting on an object is not zero |
Magnitude | the amount (size) of a measurement |
Friction | a force that one surface exerts on another when the two surfaces are in contact with each other |
Static Friction | friction between non-moving objects |
Kinetic friction | friction between moving objects |
Sliding Friction | friction between objects that slide against each other |
Rolling Friction | occurs when an object rolls over a surface |
Fluid Friction | occurs when an object moves through a fluid or gas |
Newton's 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 unbalanced force |
Newton's Second Law of Motion | the net force acting on an object is equal to the product of the object's mass and acceleration |
Newton's Third Law of Motion | for every action force there is a non-action force that is equal but acts in the opposite direction |
Law of Universal Gravitation | all objects in the universe are attracted to each other; strenght of attraction depends on the objects' masses and distance from eachother |
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 that is pulling an object in circular motion towards the center of the circle |
Geosynchronous Orbit | Occurs when an object orbits another object at a rate equal to the second objects rate of rotation |