Newtons First Law (Inertia)

Fact

a repeatedly confirmed observation agreed upon time

Hypothesis

temporary explanation for an observable phenomenon

Law

a descriptive generalization about the nature of the physical world

Theory

well tested explanation that unifies a broad range of observation

physics

the study of the rules of nature

law of inertia

newtons first law of motion

to keep an object moving

force is not required…

constant velocity

speed and direction

inertia

= mass = matter

newton

unit of force

1 Kg

10 newtons

equilibrium

E(F)= 0

equilibrium rule

the sum of all forces on a system will balance to zero, if the system doesn’t change in motion

support force

electrical repulsions in atoms, keep objects from falling through other objects

static equilibrium

zero change in motion

gravitational force

weight

dynamic equilibrium

When the sum of multiple forces on a moving object equals zero, the object will move at a steady speed in a straight line. E(F)=0

speed

distance/time

velocity

speed + **direction**

constant velocity

same remaining speed and direction

1

conversion factors always equal ___ of themselves.

acceleration

change in V / time (v/t)

free fall

when air resistance doesn’t affect the motion of a falling object, when the only force is gravity

speed

magnitude of velocity

y = (1/2) (g) (t^2)

distance in free fall