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Nathan's Forces Voc.
Force vocabulary
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 objects |
force | a push or a pull that gives energy to an object |
Units of force | forces are measured in Newtons;N |
Net force | the 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 |
Magnitude | the amount 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 object's mass and acceleration |
newton's third law of motion | for every action fprce there is a reaction force that is equal, but acts in the opposite direction |
law of universal gravitation | all objects in the universe are attracted to each other; strength of attraction depends 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 that is pulling an object in circular motion torwards the center of the circle |
Geosynchronus orbit | occurs when the an object orbits another object at a rate equal to the 2nd object's rate of motion |