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# Quinn science M2

### Forces in Motion

terminal velocity the constant velocity of a falling object when the size of upward force of air resistance matches the size of the downward force of gravity, net force 0 Newtons
free fall the condition an object is in when gravity is the only force acting on it
projectile motion the curved path an object follows when thrown or propelled near the surface of the Earth, includes horizontal and vertical motion at the same time
inertia the tendency of all objects to resist any change in motion
momentum a property of a moving object that depends on the object's mass and velocity
air resistance fluid friction opposing motion through air, depends on size and shape
orbit moving forward at a constant speed and free fall occuring together
centripetal force unbalanced force tha causes objects to move in a circular path
Newton's First Law An object at rest remains at rest and an object in motion remains in motion at a constant speed and in a straight line unless acted on by an unblanced force, inertia
Newton's Second Law the acceleration of an object depends on the mass of the object and the amount of force applied
Newton's Third Law Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first, force pairs
Law of Conservation of Momentum any time two or more objects interact, they exchange momentum, but the total amound of momentum stays the same
Galileo proved the rate at which an object falls is not affected by the mass
Parachutes increase air resistance
mass a measure of inertia
increase acceleration increase force and/or decrease mass
decrease acceleration decrease force and/or increase mass
unbalance forces motion and net force is greater than zero
balanced forces no motion, net force is equal to zero
mass amount of matter in an object, never changes
weight measure of gravity, can change due to location
Created by: cquinnd15.org