Newton’s first Law of Motion Law of Inertia Chapter 4 Newton’s first Law of Motion Law of Inertia

Aristotle 4th Century B.C. Foremost Scientist Two Types of Motion

THE MOTION ON EARTH THOUGHT TO BE STRAIGHT UP AND DOWN NATURAL MOTION THE MOTION ON EARTH THOUGHT TO BE STRAIGHT UP AND DOWN

PLANETARY MOTION IS NATURAL ARISTOTLE TAUGHT THAT THE PLANETS MOVED IN A PERFECT CIRCLE AND BECAUSE THIS WAS THEIR NATURAL MOVEMENT NO FORCE WAS REQUIRED TO MAKE THEM MOVE.

IMPOSED MOTION - THE RESULT OF FORCES THAT PUSH OR PULL VIOLENT MOTION IMPOSED MOTION - THE RESULT OF FORCES THAT PUSH OR PULL

VIOLENT MOTION IS CAUSED A FORCE CAUSES VIOLENT MOTION IT IS CAUSED BY AN OUTSIDE ACTION.

BEFORE 16TH CENTURY CONSIDERED THE EARTH AS THE CENTER OF THE UNIVERSE.

THE DARK AGES A TIME OF INTELLECTUAL STAGNATION A TIME OF TOTAL CONTROL OF THE CATHOLIC CHURCH. THE TIME OF THE INQUISITION

THE CHURCH ROLE THE CHURCH ACCEPTED WHAT ARISTOTLE STATED AS FACT. ANYONE WHO OFFERED A DIFFERENT THEORY WAS CONSIDERED A HERETIC. SOME WERE IMPRISONED AND OTHERS BURNED AT THE STAKE.

COPERNICUS NICOLAUS COPERNICUS FORMULATED THE THEORY OF THE MOVING EARTH. DID NOT PUBLISH UNTIL HE KNEW HE COULD NOT BE PUNISHED RECEIVED THE FIRST COPY OF HIS BOOK “De Revolutionibus” ON HIS DEATHBED, MAY 24, 1543.

GALILEO GENIUS SCIENTIST FROM RENAISSANCE ITALY SUPPORTED COPERNICUS DESTROYED THE IDEA THAT A FORCE IS REQUIRED TO KEEP AN OBJECT MOVING

HOW? FORCE IS A PUSH OR A PULL FRICTION IS THE FORCE THAT OPPOSES MOTION. IT OCCURS BETWEEN THE TWO MOVING SURFACES. EVEN THE SMOOTHEST SURFACES HAVE FRICTION

GALILEO AND FRICTION GALILEO SAID THAT IF FRICTION WAS PRESENT A FORCE MUST BE EXERTED IN ORDER FOR MOTION TO OCCUR. GALILEO’S EXPERIMENTS CONCERNED HOW THINGS MOVED AND NOT WHY THEY MOVED.

NEWTON’S LAW OF INERTIA EVERY OBJECT CONTIUES IN A STATE OF REST, OR OF MOTION IN A STRAIGHT LINE AT CONSTANT SPEED, UNLESS IT IS COMPELLED TO CHANGE THAT STATE BY FORCES EXERTED UPON IT.

EXAMPLES DISHES ON THE TABLE COIN ON A CARD PUTTY ON A HANGER CAN YOU THINK OF AN EXAMPLE?

MASS MASS IS A MEASURE OF INERTIA WHAT IS THE DIFFERENCE BETWEEN KICKING AN EMPTY CAN AND KICKING A FULL CAN

MASS IS NOT VOLUME MASS IS MEASURED IN KILOGRAMS VOLUME IS MEASURE A SPACE AND IS MEASURED IN UNITS SUCH AS CUBIC CENTIMETERS, CUBIC METERS, AND LITERS.

MASS IS NOT WEIGHT MASS IS THE AMOUNT OF MATTER IN AN OBJECT – OR MORE SPECIFICALLY, MASS IS MEASURE OF THE INERTIA, OR LAZINESS THAT AN OBJECT EXHIBITS IN RESPONSE TO ANY EFFORT MADE TO START IT, STOP IT, OR TTHERWISE CHANGE ITS STATE OF MOTION WEIGHT IS THE EFFECT OR FORCE OF GRAVITY UPON THAT OBJECT.

MASS AND WEIGHT ARE PROPORTIONAL WEIGHT = MASS X GRAVITY WEIGHT IS DIRECTLY PROPORTIONAL TO THE PRODUCT OF THE MASS AND THE FORCE OF GRAVITY.

UNIT OF FORCE FORCE IS MEASURED IN NEWTONS NAMED AFTER WHO? 1-KG = 9.8 N

NET FORCE THE COMBINATION OF ALL FORCES ON AN OBJECT IS THE NET FORCE.

EQUILIBRIUM WHEN ALL FORCES ACTING ON AN OBJECT ADD UP TO ZERO THIS SUM IS CALLED THE NET FORCE.

TYPES OF FORCES FORCE APPLIED FORCE OF FRICTION FORCE NORMAL

FORCE APPLIED ANY FORCE THAT IS BEING APPLIED TO AN OBJECT BY ANOTHER OBJECT

FRICTIONAL FORCE ANY FORCE THAT OPPOSES MOTION

NORMAL FORCE FORCE THAT IS PERPENDICULAR TO THE SURFACE UPON WHICH IT IS RESTING.

SUM OF THE FORCES PROBLEM SOLVING NET EXTERNAL FORCES AND SUM OF THE FORCES IS THE SAME THING. Fnet x and Fnet y ARE USED IN THE PYTHAGOREAN THEOREM TO CALCULATE THE RESULTANT FORCE AND INVERSE TANGENT TO CALCULATE THE RESULTANT DIRECTION.