FORCE

A FORCE IS A PUSH OR A PULL. IF FORCES ARE POWERFUL ENOUGH, THEY MAY RESULT IN MOTION.

What is a force?

IF THE NET FORCE ACTING ON AN OBJECT IS ZERO, THE OBJECT REMAINS AT REST, OR IF IT IS ALREADY MOVING, IT REMAINS MOVING.

Newton’s first law of motion

STATIC FRICTION - OCCURS WHEN AN OBJECT IS AT REST

SLIDING FRICTION - WHEN AN OBJECT IS SLIDING ACROSS A SURFACE

ROLLING FRICTION - WHEN AN OBJECT IS ROLLING ACROSS A SURFACE.

Three Types of Friction

THE SECOND LAW STATES THAT THE FORCE ON AN OBJECT IS EQUAL TO THE OBJECT'S MASS TIMES IT ACCELERATION:

F = MA

Newton’s second law

NEWTON'S 3RD LAW STATES THAT FORCES ALWAYS ACT IN EQUAL AND OPPOSITE PAIRS.

WHEN ONE OBJECT EXERTS A FORCE ON A SECOND OBJECT, THE SECOND OBJECT ALSO EXERTS A FORCE ON THE FIRST.

Newton’s third law of motion

1ST LAW: INERTIA LARGE BOULDER, HARD TO START MOVING, HARD TO STOP MOVING

2ND LAW: FORCE APPLIED TO AN OBJECT WILL ACCELERATE THE OBJECT -- SMALL OBJECT ACCELERATES RAPIDLY, LARGE OBJECT ACCELERATES SLOWLY.

3RD LAW: EQUAL AND OPPOSITE REACTIONS ROCKET, SKATEBOARD

Examples of Newton’s laws

MASS IS THE TOTAL AMOUNT OF MATTER IN AN OBJECT. WEIGHT IS THE MEASURE OF THE ATTRACTION OF GRAVITY TO AN OBJECT.

What is the difference between mass and weight?