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CH 10 SEC 1 THE NATURE OF FORCE GOAL PURPOSE PREVIOUSLY, STUDENTS LEARNED ABOUT SPEED AND VELOCITY, NOW THEY WILL RELATE THESE CONCEPTS TO BALANCED AND UNBALANCED FORCES WHAT IS A FORCE? FORCE- IS A PUSH OR A PULL EX- OPEN A DOOR, CARRY YOUR BACKPACK KEY- A FORCE IS DESCRIBED BY ITS MAGNITUDE AND DIRECTION IN WHICH IT ACTS. AND ARROW SHOWS HOW MUCH AND WHICH DIRECTION OF THE FORCE. MAGNITUDE- IS THE AMOUNT OF FORCE APPLIED TO MOVE AN OBJECT SKETCH UNBALANCED FORCES COPY FIGURE 2 P. 375 UNBALANCED FORCES- WHEN NET FORCES ACTING ON AN OBJECT ARE UNBALANCED. CAN BE IN SAME DIRECTION AND OPPOSITE DIRECTION EX 200 N----- AND --------100N= 100N> 200N---- AND 100---- = 300N BALANCED FORCES BALANCED FORCES- ARE EQUAL FORCES ACTING ON AN OBJECT IN OPPOSITE DIRECTIONS EX- 2500N-> + <-2500N = 0 NEWTON NEWTON- THE SI UNIT FOR THE MAGNITUDE, OR STRENGTH, OF A FORCE IS THE (N) NEWTON NET FORCE- IS THE COMBINATION OF ALL FORCES ACTING ON AN OBJECT EX 5N---- + 12N----------- = 17N EX 10N-------- + -----6N =4N EX 25N-------- + <------------25N= 0 RUN THE FOLLOWING SIMULATIONS https://phet.colorado.edu/sims/html/forcesand-motion-basics/latest/forces-andmotion-basics_en.html Q AND A 1-ABC 2-ABC http://www.brainpop.com/science/motionsf orcesandtime/acceleration/ http://www.brainpop.com/science/motionsf orcesandtime/force/ http://study.com/academy/lesson/unbalanc ed-force-definition-example-quiz.html