STARTER DIRECTIONS: WHAT IS HAPPENING IN THE PICTURE. WHAT CONCEPT DO YOU THINK THIS SCENARIO IS?

FORCE DAY 15

WHAT IS FORCE? LET’S LOOK AT THE FORCE READING PASSAGE PLEASE READ QUIETLY. ANSWER THE ANALYSIS QUESTIONS. DEF: A FORCE CAN CAUSE A RESTING OBJECT TO MOVE, OR IT CAN ACCELERATE A MOVING OBJECT BY CHANGING THE OBJECT’S SPEED OR DIRECTION.

EXAMPLES OF FORCES A FORCE IS JUST A PUSH OR PULL. EXAMPLES: AN OBJECT’S WEIGHT TENSION IN A ROPE A LEFT HOOK FRICTION ATTRACTION BETWEEN AN ELECTRON AND PROTON BODIES DON’T HAVE TO BE IN CONTACT TO EXERT FORCES ON EACH OTHER, E.G., GRAVITY.

FUNDAMENTAL FORCES OF NATURE GRAVITY ATTRACTION BETWEEN ANY TWO BODIES WITH MASS WEAKEST BUT MOST DOMINANT ELECTROMAGNETIC FORCES BETWEEN ANY TWO BODIES WITH CHARGE ATTRACTIVE OR REPULSIVE WEAK NUCLEAR FORCE – RESPONSIBLE FOR RADIOACTIVE DECAY STRONG NUCLEAR FORCE – HOLDS QUARKS TOGETHER (CONSTITUENTS OF PROTONS AND NEUTRONS)

UNITS OF FORCE

BACKGROUND SIR ISAAC NEWTON ( ) AN ENGLISH SCIENTIST AND MATHEMATICIAN FAMOUS FOR HIS DISCOVERY OF THE LAW OF GRAVITY ALSO DISCOVERED THE THREE LAWS OF MOTION. TODAY THESE LAWS ARE KNOWN AS NEWTON’S LAWS OF MOTION AND DESCRIBE THE MOTION OF ALL OBJECTS ON THE SCALE WE EXPERIENCE IN OUR EVERYDAY LIVES.

“IF I HAVE EVER MADE ANY VALUABLE DISCOVERIES, IT HAS BEEN OWING MORE TO PATIENT ATTENTION, THAN TO ANY OTHER TALENT.” -SIR ISAAC NEWTON

REPRESENTING FORCE YOU CAN USE ARROWS TO REPRESENT THE DIRECTION AND STRENGTH OF FORCE (VECTORS) THE LENGTH OF THE VECTOR REPRESENTS THE STRENGTH OR MAGNITUDE OF THE FORCE

COMBINING FORCE YOU CAN COMBINE FORCE ARROWS TO SHOW THE RESULT OF HOW FORCES COMBINE FORCES IN THE SAME DIRECTION ADD FORCES IN OPPOSITE DIRECTIONS SUBTRACT THE NET FORCE IS THE OVERALL FORCE ACTING ON AN OBJECT AFTER ALL THE FORCES ARE COMBINED

VECTOR FORCES DIRECTIONS: AS A GROUP, DISCUSS THE FOLLOWING STATEMENTS. ON POSTER PAPER, DRAW A T- CHART. LEFT-SIDE LABEL BALANCE FORCE. RIGHT-SIDE LABEL UNBALANCE FORCE. CLASSIFY EACH EXAMPLE AS BALANCED OR UNBALANCED FORCES IN THE T-CHART AND DRAW THE VECTOR SHOWING THE DIRECTION OF ACCELERATION (IF ANY).

BALANCED & UNBALANCED FORCES WHEN THE FORCES ON AN OBJECT ARE BALANCED, THE NET FORCE IS ZERO AND THERE IS NO CHANGE IN THE OBJECTS MOTION WHEN AN UNBALANCED FORCE ACTS ON AN OBJECT THE OBJECT ACCELERATES.

TEACHER EXPLAINS:FORCES OBJECTS ALWAYS HAVE FORCES ACTING UPON THEM. SOMETIMES MANY FORCES AT ONCE. TYPES OF FORCES: F N, F G, F LEFT, F RIGHT

NEWTON’S LAWS OF MOTION

APPLICATION HOW IS THE MOTION OF AN OBJECT AFFECTED WHEN A FORCE ACTS ON IT? WHAT DIRECTION DO YOU THINK GRAVITY IS IN? THREE PARTS: VECTORS BOULDER PICTURE: F NET A FORCE DIAGRAM

PRACTICE WHAT IS THE FORCE OF A 1200 KG CAR THAT IS ACCELERATING AT 10 METERS PER SECONDS SQUARED? WHAT IS THE MASS OF AN OBJECT ACCELERATING 10 METERS PER SECOND SQUARED WITH A FORCE OF 100N? THE OBJECT HAS A FORCE 200 N WITH A MASS OF 25 KG, WHAT IS THE OBJECT’S ACCELERATION?

EXIT SLIP WHAT IS FORCE? GIVE AN EXAMPLE DRAWING.