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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