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# forces patelunes

### forces vocab

Vocabulary WordDefinition
net force the sum of all the forces acting upon an object.
momentum The quantity of motion of a moving body, measured as a product of its mass and velocity.
formula of momentum p=mv
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 push or pull.
units of force forces are measured in newtons
Inertia A property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force
Balanced force net force acting on an object is zero
Unbalanced force forces that produce a non-zero net force
Magnitude the amount of a measurement.
Friction The resistance that one surface or object encounters when moving over another.
static friction friction between nonmoving objects
kinetic friction friction between moving objects
sliding friction friction between objects that slide
rolling Friction occurs when an object rolls over a surface
Fluid Friction occurs when an object moves through a fluid or a gas
Newtons First Law of Motion In the absence of a net force, an object will continue with its present velocity. If it is at rest, it will stay at rest. If it is moving, it will maintain its velocity
Newtons second law of motion the rate of change of momentum is proportional to the imposed force and goes in the direction of the force
Newtons third law of motion every action force has an equal reaction force
Law of universal gravitation every point mass in the universe attracts every other point mass with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
free fall motion of an object when only gravity is acting on it
terminal velocity constant speed that a freely falling object eventually reaches when the resistance of the medium through which it is falling prevents further acceleration
weight The force exerted on the mass of a body by a gravitational field
mass quantity of matter that a body contains
centripetal force force that acts on a body moving in a circular path and is directed toward the center around which the body is moving
geosynchronous orbit occurs when an object orbits another object at a rate equal to the 2nd objects rate of rotation.
Created by: c_laco