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# Newton's Laws

### COVERT - First, Second and Third Laws

TermDefinition
Balanced Forces Two or more forces exerted on an object.
Why when effects ARE canceled out do they NOT cause a change in motion? because Balanced forces means the Net force is zero.
Force A push or pull.
Velocity Speed and Direction of a moving object.
Net Force Combination of all forces acting on an object.
With more than on force, this determines the motion of an object Net Force
Unbalanced forces Effects don't cancel each other; motion of object changes
Newton's First Law of Motion If the net force of a single object is zero, the object remains at rest.
Newton's First Law of Motion If an object is in motion, it continues to move in a straight line with constant speed, as it stays in motion, unless acted upon by a force.
Friction the force that brings everything to a stop, and acts to resist sliding between two touching surfaces.
Static Friction prevents an object from moving when a force is applied. Upward force must be overcome to move an object with mass.
Sliding Friction To slide across a surface, friction must be overcome.
Rolling Friction occurs between the ground and wheels to keep tire from slipping on the ground.
Fluid Friction A type of force that causes resistance in liquid or in air.
Gravity pulls and attracts objects toward each other.
Newton's Second Law of Motion Connects Force, Acceleration and Mass A (meters per second per second) = net force in Newtons / mass in kg
Newton's Second Law of Motion a is for acceleration, m is for mass, and Fnet is net force.
Newton's Second Law of Motion Speeding up or Slowing down, Acceleration tells how velocity changes.
Newton's Second Law of Motion turning = a curved path circular Motion = constantly accelerating
Air Resistance A form of friction that acts to slow down any object moving in the air.
Center of Mass A point in an object that moves as if all the object's mass were concentrated at that point.
Newton's Third Law of Motion forces always act in equal but opposite pairs.
Newton's Third Law of Motion for every action there is a reaction.
Newton's Third Law of Motion when one object exerts a force on another object the second object exerts the same force on the first object.
Falling Objects with different mass accelerate with the same rate but do not hit the ground with the same force.
Action and Reaction Pairs do not cancel because they act on different objects.
Inertia is the tendency of an object to resist any change in it's motion and the greater the inertia then the greater force needed to change it's motion.
Free fall an object is in free fall if the only force acting on the object is gravity
9.8 m/s/s that rate at which all objects free fall
Weightlessness the condition that occurs in free fall when the weight of an objects seems to be zero
Created by: MrsCovert