A PUSH OR PULL THAT CHANGES THE WAY AN OBJECT MOVES

A MEASURE OF THE FORCE OF GRAVITY ON AN OBJECT

YOU CAN MEASURE FORCES USING A SPRING SCALE. A SPRING SCALE MEASURES FORCE IN NEWTONS

A FORCE THAT RESISTS MOTION FRICTION HAPPENS WHEN TWO SURFACES COME IN CONTACT

THE WAY AN OBJECT FEELS; SMOOTH SOFT OR SLIPPERY

IF FRICTION DID NOT EXIST WE WOULD SLIP WHEN WE WALK

WHEN YOU ARE ON A SKATEBOARD YOU WANT TO FAST, FRICTION SLOWS YOU DOWN

IF YOU ARE GOING UP A SLOPE YOU NEED TO USE MORE FORCE. IF YOU ARE GOING DOWN A SLOPE THEN YOU USE LESS FORCE

THE MORE LOAD THE MORE FORCE NEEDED. THE LESS LOAD THE LESS FORCE NEEDED

WHEN TWO FORCES WITH EQUAL STRENGTH MOVE IN OPPOSITE DIRECTION

WHEN AN OBJECT IS IN EQUILIBRIUM THE MOTION OF OBJECT DOESN'T CHANGE

WHEN AN OBJECT IS IN EQUILIBRIUM THE MOTION OF OBJECT DOESN'T CHANGE

TWO FORCES WITH UNEQUAL STRENGTH