Physical science Ch.2
inertia
Resistance of an object to a change in its motion
Newtons third Law
Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first.
Newtons Second Law
a=F/M (acceleration equals force divided by mass) The acceleration produced by a net force on an object is directly proportional to the net force, is in the same direction as the net force, and is inversely proportional to the mass of the object.
Newtons First Law
an object at rest will stay at rest, an object in motion will stay in motion unless disturbed by an un balenced force.
Single interaction
comprises with an action and a reaction
a falling object that has reached its terminal speed continues to gain
neither speed or acceleration
Weight
reaction to gravity, the person's body pulling on Earth
terminal velocity
terminal speed in a given direction (often downward)
free fall
the motion of a falling object when the only force acting on it is gravity
terminal speed
the speed at which the acceleration of a falling object is zero because friction balances the weight
free falling object
velocity increases, acceleration increases
free falling object through air
when gaining velocity, net force increases
An object in motion tends to remain in motion
without the need of a force
A falling objects has reached terminal velocity, its acceleration is__?
zero
the net force on any object moving at constant velocity is
zero
