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3413760-137160WEB#2: KINETIC ENERGYkinetic energykinetic equationpotential energygravitational potential energygravitational potential energy equationelastic potential energymechanical potential energychemical potential energyMECHANICAL ENERGYmechanical energy equation00WEB#2: KINETIC ENERGYkinetic energykinetic equationpotential energygravitational potential energygravitational potential energy equationelastic potential energymechanical potential energychemical potential energyMECHANICAL ENERGYmechanical energy equation1347470-129952WEB#1: WORKworkwork equationwork unitjouleenergymechanical energy equationenergy unitpowerpower equationpower unit00WEB#1: WORKworkwork equationwork unitjouleenergymechanical energy equationenergy unitpowerpower equationpower unitSc7 UNIT 2: ENERGY WORKMACHINESlessons 1-2-82138194945LESSON 1: WORK, ENERGY AND POWERWORK: THE USE OF FORCE TO MOVE AN OBJECTBOTH FORCE & MOTION MUST BE IN THE SAME DIRECTIONEQUATION: WORK = FORCE x DISTANCEUNITS OF WORK : 1 NEWTON*METER = 1 JOULEENERGY: THE ABILITY TO DO WORKENERGY NECESSARY TO DO WORKUNITS OF ENERGY THE SAME: A JOULEWORK TRANSFERS ENERGY TO AN OBJECTPOWER: HOW FAST WORK IS DONEEQUATION: ENERGY ÷ TIMEUNITS OF POWER: JOULE PER SECOND (JOULE/SEC) = 1 WATT00LESSON 1: WORK, ENERGY AND POWERWORK: THE USE OF FORCE TO MOVE AN OBJECTBOTH FORCE & MOTION MUST BE IN THE SAME DIRECTIONEQUATION: WORK = FORCE x DISTANCEUNITS OF WORK : 1 NEWTON*METER = 1 JOULEENERGY: THE ABILITY TO DO WORKENERGY NECESSARY TO DO WORKUNITS OF ENERGY THE SAME: A JOULEWORK TRANSFERS ENERGY TO AN OBJECTPOWER: HOW FAST WORK IS DONEEQUATION: ENERGY ÷ TIMEUNITS OF POWER: JOULE PER SECOND (JOULE/SEC) = 1 WATT-84406232215LESSON 2: KINETIC AND POTENTIAL ENERGYMOMENTUM: A MEASURE OF AN OBJECTS INERTIADEPENDS ON MASS, VELOCITYEQUATION: MOMENTUM = mv KINETIC ENERGY (KE): THE ENERGY OF MOTION (measured in joules)ALL MOVING OBJECTS OR MOLECULES HAVE KINETIC ENERGYKINETIC ENERGY DEPENDS ON MASS AND SPEEDEQUATION: ? mv2 POTENTIAL ENERGY (PE): STORED ENERGY (measured in joules)POTENTIAL ENERGY HAS THE ABILITY TO DO WORKTYPES OF POTENTIAL ENERGYGRAVITATION POTENTIAL ENERGY BASED ON HEIGHTGPE = mass x 9.8 m/s2 x height (gpe = m*g*h) wt X 10 m/s2GREATER HEIGHTS RESULT IN GREATER gpe.ELASTIC POTENTIAL ENERGY STORED IN STRETCHED OBJECTMECHANICAL POTENTIAL (MPE) STORED IN POSITIONNOT HEIGHT ABOVE GROUND (gpe)EQUATION: ME = KE + PECHEMICAL POTENTIAL STORE IN BONDS BETWEEN ATOMS MECHANICAL ENERGY: ENERGY OF AN OBJECT DUE TO ITS MOTION AND POSITIONKINETIC ENERGY PLUS POTENTIAL ENERGY ( ME=KE + PE ); MEASURED IN JOULESEXAMPLE: SIMPLE MACHINES00LESSON 2: KINETIC AND POTENTIAL ENERGYMOMENTUM: A MEASURE OF AN OBJECTS INERTIADEPENDS ON MASS, VELOCITYEQUATION: MOMENTUM = mv KINETIC ENERGY (KE): THE ENERGY OF MOTION (measured in joules)ALL MOVING OBJECTS OR MOLECULES HAVE KINETIC ENERGYKINETIC ENERGY DEPENDS ON MASS AND SPEEDEQUATION: ? mv2 POTENTIAL ENERGY (PE): STORED ENERGY (measured in joules)POTENTIAL ENERGY HAS THE ABILITY TO DO WORKTYPES OF POTENTIAL ENERGYGRAVITATION POTENTIAL ENERGY BASED ON HEIGHTGPE = mass x 9.8 m/s2 x height (gpe = m*g*h) wt X 10 m/s2GREATER HEIGHTS RESULT IN GREATER gpe.ELASTIC POTENTIAL ENERGY STORED IN STRETCHED OBJECTMECHANICAL POTENTIAL (MPE) STORED IN POSITIONNOT HEIGHT ABOVE GROUND (gpe)EQUATION: ME = KE + PECHEMICAL POTENTIAL STORE IN BONDS BETWEEN ATOMS MECHANICAL ENERGY: ENERGY OF AN OBJECT DUE TO ITS MOTION AND POSITIONKINETIC ENERGY PLUS POTENTIAL ENERGY ( ME=KE + PE ); MEASURED IN JOULESEXAMPLE: SIMPLE MACHINES330134011875WEB#4: Simple Machines1. lever2. fulcrum3. ideal mechanical advantage4. equation for ideal mechanical advantage5. 1st class lever6. 2nd class lever7. 3rd class lever8. wheel and axle9. pulley10.fixed pulley11. moveable pulley12. block and tackle pulley13. inclined plane (ramp)14. equation for ramp’s ideal MA15. wedges16. screws 00WEB#4: Simple Machines1. lever2. fulcrum3. ideal mechanical advantage4. equation for ideal mechanical advantage5. 1st class lever6. 2nd class lever7. 3rd class lever8. wheel and axle9. pulley10.fixed pulley11. moveable pulley12. block and tackle pulley13. inclined plane (ramp)14. equation for ramp’s ideal MA15. wedges16. screws Sc7: Unit 2 Lesson 3-356260397478WEB#3: Machines1. machine2. simple machines3. the 6 simple machines4. input force5. output force6. work input7. work output8. mechanical advantage9. equation for mechanical advantage10. mechanical efficiency11. equation for mechanical efficiency00WEB#3: Machines1. machine2. simple machines3. the 6 simple machines4. input force5. output force6. work input7. work output8. mechanical advantage9. equation for mechanical advantage10. mechanical efficiency11. equation for mechanical efficiency Simple Machines-358363434340MACHINES: DEVICES THAT MAKE WORK EASIERMACHINES CAN CHANGE THE SIZE OF FORCE, DIRECTION OF FORCE, &THE DISTANCE OF FORCESIMPLE MACHINES MAKE UP MACHINESSIMPLE MACHINES MAKE WORK EASIER WITH A SIMPLE MOTION6 SIMPLE MACHINES: RAMPS, LEVERS. WHEELS/AXLES, SCREW, WEDGES, AND PULLEYSMACHINES CAN MULTIPLE FORCE OR MULTIPLE DISTANCECANNOT DO BOTH: (ex) MULTIPLY FORCE AT COST OF LONGER DISTANCESCAN NEVER MULTIPLY WORK00MACHINES: DEVICES THAT MAKE WORK EASIERMACHINES CAN CHANGE THE SIZE OF FORCE, DIRECTION OF FORCE, &THE DISTANCE OF FORCESIMPLE MACHINES MAKE UP MACHINESSIMPLE MACHINES MAKE WORK EASIER WITH A SIMPLE MOTION6 SIMPLE MACHINES: RAMPS, LEVERS. WHEELS/AXLES, SCREW, WEDGES, AND PULLEYSMACHINES CAN MULTIPLE FORCE OR MULTIPLE DISTANCECANNOT DO BOTH: (ex) MULTIPLY FORCE AT COST OF LONGER DISTANCESCAN NEVER MULTIPLY WORK-364490156845MECHANICAL ADVANTAGE: INDICATES HOW MUCH FORCE (OR DISTANCE) IS MULTIPLIEDMA = 1: CHANGES DIRECTION; MA > 1 FORCE MULTIPLIED; MA < 1 DISTANCE MULTIPLIEDMA EQUATION: MA = OUTPUT FORCE ÷ INPUT FORCE OUTPUT FORCE: FORCE DONE BY THE MACHINEINPUT FORCE: FORCE YOU PUT INTO MACHINE00MECHANICAL ADVANTAGE: INDICATES HOW MUCH FORCE (OR DISTANCE) IS MULTIPLIEDMA = 1: CHANGES DIRECTION; MA > 1 FORCE MULTIPLIED; MA < 1 DISTANCE MULTIPLIEDMA EQUATION: MA = OUTPUT FORCE ÷ INPUT FORCE OUTPUT FORCE: FORCE DONE BY THE MACHINEINPUT FORCE: FORCE YOU PUT INTO MACHINE-352425110490MECHANICAL EFFICIENCY: INDICATES HOW MUCH WORK IS LOST TO FRICTIONME IS ALWAYS EXPRESSED AS A PERCENTAGE LESS THAN 100% (FRICTION ALWAYS PRESENT)ME EQUATION: ME = (WORK OUTPUT ÷ WORK INPUT ) x 100WORK OUTPUT: WORK DONE BY THE MACHINEWORK INPUT: WORK YOU PUT INTO A MACHINEAMA: ACTUAL MECHANICAL ADVANTAGE INCLUDES FRICTIONIMA: IDEAL MECHANICAL ADVANTAGE: NO FRICTION INCLUDED, MAXIMUM ma, NOT ACHIEVABLE 00MECHANICAL EFFICIENCY: INDICATES HOW MUCH WORK IS LOST TO FRICTIONME IS ALWAYS EXPRESSED AS A PERCENTAGE LESS THAN 100% (FRICTION ALWAYS PRESENT)ME EQUATION: ME = (WORK OUTPUT ÷ WORK INPUT ) x 100WORK OUTPUT: WORK DONE BY THE MACHINEWORK INPUT: WORK YOU PUT INTO A MACHINEAMA: ACTUAL MECHANICAL ADVANTAGE INCLUDES FRICTIONIMA: IDEAL MECHANICAL ADVANTAGE: NO FRICTION INCLUDED, MAXIMUM ma, NOT ACHIEVABLE -249382-172193THE 6 TYPES OF SIMPLE MACHINES1. LEVER: A BAR THAT PIVOTS ON A FULCRUM (THE PIVOT POINT OF A LEVER) 1ST CLASS LEVER: FULCRUM IN MIDDLE (“F”)MULTIPLES FORCE OR DISTANCE AND CHANGES DIRECTIONEXAMPLE: SEE-SAW2ND CLASS LEVER: RESISTANCE (OBJECT) IN THE MIDDLE (“R”)MULTIPLES FORCE WITHOUT CHANGING DIRECTION EXAMPLE : WHEEL BARROW3RD CLASS LEVER: EFFORT IN THE MIDDLE – YOU – (“E”)MULTIPLIES DISTANCE WITHOUT CHANGING DIRECTIONUSED TO MULTIPLE THE MOMENTUM TRANSFERRED TO OBJECTS IN SPORTS (bat)EXAMPLES: BASEBALL BATS, GOLF CLUBS, HAMMERS00THE 6 TYPES OF SIMPLE MACHINES1. LEVER: A BAR THAT PIVOTS ON A FULCRUM (THE PIVOT POINT OF A LEVER) 1ST CLASS LEVER: FULCRUM IN MIDDLE (“F”)MULTIPLES FORCE OR DISTANCE AND CHANGES DIRECTIONEXAMPLE: SEE-SAW2ND CLASS LEVER: RESISTANCE (OBJECT) IN THE MIDDLE (“R”)MULTIPLES FORCE WITHOUT CHANGING DIRECTION EXAMPLE : WHEEL BARROW3RD CLASS LEVER: EFFORT IN THE MIDDLE – YOU – (“E”)MULTIPLIES DISTANCE WITHOUT CHANGING DIRECTIONUSED TO MULTIPLE THE MOMENTUM TRANSFERRED TO OBJECTS IN SPORTS (bat)EXAMPLES: BASEBALL BATS, GOLF CLUBS, HAMMERS-2476502355842. WHEEL AND AXLE: A LARGER WHEEL THAT TURNS A SMALLER SHAFTMA OF A WHEEL AND AXLE = RADIUS OF INPUT (WHEEL) ÷ RADIUS OF OUTPUT (SHAFT)LARGER WHEELS CREATE GREATER MA 3. PULLEYS: A GROOVED WHEEL AND AXLE HOLDING A LINE OR ROPETHE IDEAL MA OF A PULLEY SYSTEM EQUALS THE # OF LINES DIRECTLY HOLDING UP THE OBJECTFIXED PULLEYS: ATTACHED TO A STATIONARY OBJECT: CANNOT MOVECAN ONLY CHANGE THE DIRECTION OF FORCEALWAYS HAVE AN IDEAL MA OF 1MOVABLE PULLEY: NOT ATTACHED, FREE TO MOVE UP AND DOWNMOVING PULLEYS DO NOT CHANGE THE DIRECT OF FORCEMOVING PULLEYS ALWAYS MULTIPLY FORCE AT THE COST OF LONGER DISTANCESPULLEY SYSTEMS (BLOCK AND TACKLES) COMBINE FIXED AND MOVING PULLEYSPULLEY SYSTEMS MAY BOTH CHANGE DIRECT OF FORCE AND MULTIPLY FORCEPULLEY SYSTEM ALWAYS MULTIPLE FORCE: MA = # OF LINES HOLDING MOVABLE PULLEY 002. WHEEL AND AXLE: A LARGER WHEEL THAT TURNS A SMALLER SHAFTMA OF A WHEEL AND AXLE = RADIUS OF INPUT (WHEEL) ÷ RADIUS OF OUTPUT (SHAFT)LARGER WHEELS CREATE GREATER MA 3. PULLEYS: A GROOVED WHEEL AND AXLE HOLDING A LINE OR ROPETHE IDEAL MA OF A PULLEY SYSTEM EQUALS THE # OF LINES DIRECTLY HOLDING UP THE OBJECTFIXED PULLEYS: ATTACHED TO A STATIONARY OBJECT: CANNOT MOVECAN ONLY CHANGE THE DIRECTION OF FORCEALWAYS HAVE AN IDEAL MA OF 1MOVABLE PULLEY: NOT ATTACHED, FREE TO MOVE UP AND DOWNMOVING PULLEYS DO NOT CHANGE THE DIRECT OF FORCEMOVING PULLEYS ALWAYS MULTIPLY FORCE AT THE COST OF LONGER DISTANCESPULLEY SYSTEMS (BLOCK AND TACKLES) COMBINE FIXED AND MOVING PULLEYSPULLEY SYSTEMS MAY BOTH CHANGE DIRECT OF FORCE AND MULTIPLY FORCEPULLEY SYSTEM ALWAYS MULTIPLE FORCE: MA = # OF LINES HOLDING MOVABLE PULLEY -323850-476244. INCLINED PLANES: A SLANTED, FLAT SURFACE ( A RAMP ) THAT IS FIXEDLONGER RAMPS HAVE A GREATER IDEAL MA, REDUCING FORCE AT THE PRICE OF DISTANCEIDEAL MA OF A RAMP = RAMP LENGTH ÷ RAMP HEIGHT5. WEDGES: A MOVABLE SINGLE OR DOUBLE INCLINED PLANELONGER, THINNER WEDGES HAVE GREATER IDEAL MAEXAMPLES: HAMMER CLAW, CHISEL, KNIFE EDGE6. SCREW: AN INCLINED PLANE WRAPPED AROUND A CYLINDERTHREADS: THE TERM FOR THE RIDGES ON A SCREWCLOSER THREADS HAVE GREATER IDEAL MA, EASIER TO TURN004. INCLINED PLANES: A SLANTED, FLAT SURFACE ( A RAMP ) THAT IS FIXEDLONGER RAMPS HAVE A GREATER IDEAL MA, REDUCING FORCE AT THE PRICE OF DISTANCEIDEAL MA OF A RAMP = RAMP LENGTH ÷ RAMP HEIGHT5. WEDGES: A MOVABLE SINGLE OR DOUBLE INCLINED PLANELONGER, THINNER WEDGES HAVE GREATER IDEAL MAEXAMPLES: HAMMER CLAW, CHISEL, KNIFE EDGE6. SCREW: AN INCLINED PLANE WRAPPED AROUND A CYLINDERTHREADS: THE TERM FOR THE RIDGES ON A SCREWCLOSER THREADS HAVE GREATER IDEAL MA, EASIER TO TURN ................
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