Question | Answer |
Momentum | the product of an object's mass and its velocity |
Formula for Monentum | m=pv |
Law of Consevation of Momentum | the totl momentum of any group of objects remains the same unlss outside forces also act on the objects |
Force | a push or a pull that gives energy to an obct |
Units of Force | fources are measurd 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 ts motion |
Balanced Force(s) | the net force acting on an object is zero |
Unbalanced Force(s) | te 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 otr |
Static Fricon | friction between non-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 though a fluid or a 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 ecery action force there is a reaction force that is equal, but acts in the oppisite direction |
Kaw 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 towards the center of the circle |
Geosynchronous Orbit | occurs when an object orbits another object at a rate equal to the 2nd object's rate of rotaion |