2. CH 10 SEC 1 THE NATURE OF FORCE

3. GOAL PURPOSE PREVIOUSLY, STUDENTS LEARNED ABOUT SPEED AND VELOCITY, NOW THEY WILL RELATE THESE CONCEPTS TO BALANCED AND UNBALANCED FORCES PREVIOUSLY, STUDENTS LEARNED ABOUT SPEED AND VELOCITY, NOW THEY WILL RELATE THESE CONCEPTS TO BALANCED AND UNBALANCED FORCES

4. WHAT IS A FORCE? FORCE - IS A PUSH OR A PULL FORCE - IS A PUSH OR A PULL EX- OPEN A DOOR, CARRY YOUR BACKPACK 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. 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 MAGNITUDE - IS THE AMOUNT OF FORCE APPLIED TO MOVE AN OBJECT

6. SKETCH

7. UNBALANCED FORCES COPY FIGURE 2 P. 375 COPY FIGURE 2 P. 375 UNBALANCED FORCES- WHEN NET FORCES ACTING ON AN OBJECT ARE UNBALANCED. CAN BE IN SAME DIRECTION AND OPPOSITE DIRECTION UNBALANCED FORCES- WHEN NET FORCES ACTING ON AN OBJECT ARE UNBALANCED. CAN BE IN SAME DIRECTION AND OPPOSITE DIRECTION EX EX 200 N-----  AND  --------100N= 100N> 200 N-----  AND  --------100N= 100N> 200N----  AND 100----  = 300N  200N----  AND 100----  = 300N 

8. BALANCED FORCES BALANCED FORCES- ARE EQUAL FORCES ACTING ON AN OBJECT IN OPPOSITE DIRECTIONS BALANCED FORCES- ARE EQUAL FORCES ACTING ON AN OBJECT IN OPPOSITE DIRECTIONS EX- 2500N-> + + <-2500N = 0

9. NEWTON NEWTON - THE SI UNIT FOR THE MAGNITUDE, OR STRENGTH, OF A FORCE IS THE (N) 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 NET FORCE- IS THE COMBINATION OF ALL FORCES ACTING ON AN OBJECT EX 5N----  + 12N-----------  = 17N EX 5N----  + 12N-----------  = 17N EX 10N--------  +  -----6N =4N EX 10N--------  +  -----6N =4N EX 25N--------  + <------------25N= 0 EX 25N--------  + <------------25N= 0

10. RUN THE FOLLOWING SIMULATIONS https://phet.colorado.edu/sims/html/forces- and-motion-basics/latest/forces-and- motion-basics_en.html https://phet.colorado.edu/sims/html/forces- and-motion-basics/latest/forces-and- motion-basics_en.html https://phet.colorado.edu/sims/html/forces- and-motion-basics/latest/forces-and- motion-basics_en.html https://phet.colorado.edu/sims/html/forces- and-motion-basics/latest/forces-and- motion-basics_en.html

11. Q AND A 1-ABC 1-ABC 2-ABC 2-ABC http://www.brainpop.com/science/motionsf orcesandtime/acceleration/ http://www.brainpop.com/science/motionsf orcesandtime/acceleration/ http://www.brainpop.com/science/motionsf orcesandtime/acceleration/ http://www.brainpop.com/science/motionsf orcesandtime/acceleration/ http://www.brainpop.com/science/motionsf orcesandtime/force/ http://www.brainpop.com/science/motionsf orcesandtime/force/ http://www.brainpop.com/science/motionsf orcesandtime/force/ http://www.brainpop.com/science/motionsf orcesandtime/force/ http://study.com/academy/lesson/unbalanc ed-force-definition-example-quiz.html http://study.com/academy/lesson/unbalanc ed-force-definition-example-quiz.html http://study.com/academy/lesson/unbalanc ed-force-definition-example-quiz.html http://study.com/academy/lesson/unbalanc ed-force-definition-example-quiz.html