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## Ignore words

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friction
a contact force; type of force between two touching surfaces
The Law of Inertia
Objects will stay in motion/at rest until acted upon by a force
mass
a body of coherent matter, usually of indefinite shape and often of considerable size
force
(interactions between two objects)
unbalanced force
force acting on an object that causes a change
gravity
(physics) the force of attraction between all masses in the universe
inertia
_______ is the property of an object that leads it to resist any change in motion
accelerate
Changes direction
more than one
The number of forces it usually takes for an object to accelerate
net force
Acceleration depends on the
action and reaction forces
are equal, in opposite directions, and happen at the same time
Newton's second law
Acceleration is produced when a force acts on a mass, the greater the mass, the more force is required to accelerate the object.
Newton's Third Law
All forces come in pairs. The two forces in a pair act on different objects and are equal in strength and opposite in direction.
Sir Isaac Newton
Gave us the 3 laws of motion
F=MxA
Force = Mass x Acceleration
Instantaneous
Speed given at any point of time
average
A number representing the value of a quantity if that quantity did not change (was constant) throughout the period of interest.
Distance
a path taken and always a positive number
the speed of an object in motion
The slope of a line on a distance-time graph showes
time
A measure of change between two events or moments.
Speed
Units: cm/s, m/s, mi/hr, km/s ...
Average Speed (v) =
total distance (d) / total time (t)
Distance d=
v x t calculates the
d/v
Time t=
Speed v=
d/t calculates the
Distance:
Units: centimeters (cm), meters (m), kilometers (km), miles (mi), feet (ft)...
displacement
A change in position (delta p).
weight
A force that comes from gravity pulling down on any object with mass
volume
Amount of space occupied by an object