Newton's First Law of Motion
An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
Newton's Second Law of Motion
F=ma
Newton's Third Law
Action-Reaction. For every action force, there's an equal but opposite reaction force.
Inertia
Resistance of an object to change its motion
Unbalanced Forces
ALWAYS cause a change in motion. They are NOT equal in size.
Balanced Forces
DO NOT cause a change in motion. They are EQUAL in size and ARE opposite in direction.
Mass
The amount of matter in an object
Force
A push or a pull resulting from the interaction of an object
Acceleration
The change in speed over time
Gravity
The force of attraction between any 2 bodies that have mass. This force pulls all objects to the Earth with the same acceleration
Friction
This opposes motion and slows objects down
Newton's 3rd Law of Motion
For every action, there is an equal and opposite reaction.
Newtons (N)
Unit of force
Objects with smaller masses have
less inertia
Objects with larger masses have
more inertia
Law of Inertia
First Law of Motion
Law of Action-Reaction
Third Law of Motion
Normal Force (Fn)
The perpendicular force exerted by a surface on an object in contact with it
Drag
Resistance of a fluid against the forward movement of an airplane.
Tension Force
The force that is transmitted through a string, rope, cable or wire when it is pulled tight by forces acting from opposite ends
Weight
A measure of the force of gravity on an object
contact force
a force that requires two pieces of matter to touch
field force
a force that is exerted without contact
acceleration/force relationship
the more force you apply, the greater the acceleration (change in speed or direction)
acceleration/mass relationship
the greater the mass, the more force necessary to get an object to accelerate
Acceleration and mass are
inversely proportional
Force and mass are
directly proportional
Acceleration and force are
directly proportional