CHAP 2 THE LAWS OF MOTION Flashcards
Net force
Combination of all forces acting on an object
Newton’s First Law of Motion
(Law of Inertia)
If the net force on an object is zero, the motion of the object does not change.
Balanced Forces
Forces acting on an object that combine and form a net force of zero are….
Unbalanced Forces
Forces acting upon an object that combine and do not form a net force of zero are…
Inertia
The tendency of an object to resist a change in motion is called…
Newton’s Second Law of Motion
The acceleration of an object is equal to the net force acting upon an object divided by the objects mass. F=MA
Circular motion
Any motion moving along a curved path.
Centripetal force
In circular motion, a force that acts perpendicular to the direction of motion, towards the center of the curve, is…
Newton’s Third Law of Motion
When one object exerts a force on a second object, the second object exerts an equal force in the opposite direction on the first object.
Force pair
the forces two objects apply to each other is a…
Momentum
A measure of how hard it is to stop moving a moving object is…
Law of Conservation of Momentum
The total momentum of a group of objects stays the same unless outside forces act on the objects.
Static Friction
Static friction prevents surfaces from sliding past each other. Up to a limit, the strength of static friction changes to match the applied force, the item will still not move because the static friction also increased.
Sliding Friction
When static friction reaches its limit between surfaces, the object will move. Sliding friction opposes the motion of surfaces sliding past each other. as long as the object is sliding the sliding friction does not change.
Fluid Friction
occurs between fluid layers that are moving relative to each other
