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79 Cards in this Set
- Front
- Back
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EXAMPLE OF THINGS THAT USE CAMS AND CRANKS INCLUDE:
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-SEWING MACHINE
-CAR ENGINE |
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ROLLING FRICTION HAS:
1. MOST FRICTION 2. LESS FRICTION 3. LEAST FRICTION |
3. LEAST FRICTION
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THE FORMULA FOR THE MECHANICAL ADVANTAGE IS CALLED "IDEAL" BECAUSE
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FRICTION IS ALWAYS A FACTOR THAT LESSENS THE MECHANICAL ADVANTAGE. THEREFORE, WE CALCULATE WHAT THE ADVANTAGE WOULD BE WITHOUT FRICTION UNDER IDEAL CONDITIONS.
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THE FORCE EXERTED ON A MACHINE IN CALLED
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INPUT FORCE
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THE SPIRAL AROUND THE SCREW IS CALLED?
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THE THREAD
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WHAT IS FRICTION?
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A FORCE THAT TAKES PLACE WHEN ONE SURFACE SLIDES AGAINST ANOTHER
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_____ TAKES PLACE WHEN USING AN INCLINED PLANE
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FRICTION
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THE AMOUNT OF EFFORT WE SAVE BY USING A TOOL IS CALLED:
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MACHANICAL ADVANTAGE
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THE FULCRUM OA A CLASS THREE LEVER IS ALWAYS WHERE?
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AT ONE END
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THE STUDY OF THE PROPERTIES OF MATTER AND ENERGY IS CALLED _______?
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PHYSICS
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TO DETERMINE THE IDEAL MECHANICAL ADVANTAGE FOR AN INCLINED PLANE (FORMULA)
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IDEAL MECH. LENGTH OF BOARD
ADV. = _______________ HEIGHT OF THE INCLINE (DIVIDE LENGTH X HEIGHT) |
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MECHANICAL ADVANTAGE = (FORMULA)
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MECHANICAL ADVANTAGE =
OUTPUT FORCE ____________ INPUT FORCE |
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THERE ARE ___ CLASSES OF LEVERS?
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3
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WHAT IS FORCE?
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A PUSH OR PULL
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A LONGER INCLINED PLANE AT THE SAME HEIGHT GIVES THE WORKER A _____ MECHANICAL ADVANTAGE.
(GREATER, LESS) |
GREATER
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THE FORCE EXERTED ON A LOAD BY A MACHINE IS CALLED?
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OUTPUT FORCE
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IN A MOVEABLE PULLEY, THE WHEEL IS ATTACHED TO WHAT?
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THE WHEEL IS ATTACHED TO THE LOAD. THE WHEEL MOVES UP AND DOWN WITH THE LOAD
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HOW IS FRICTION HELPFUL?
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ALLOWS US TO SLOW DOWN A CAR, GRAB AN OBJECT, STOP WHEN WE ARE RUNNING
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DESCRIBE A WEDGE
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IT HAS A THICK END THAT TAPERS INTO A THIN, POINTED END
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TOOLS MAKE WORK EASIER BECAUSE?
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THEY CHANGE THE FORCE APPLIED TO THE WORK
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CLASS ONE LEVERS CONSIST OF:
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-A ROD
-FULCRUM -LOAD ARM -EFFORT ARM |
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FRICTION MAKES WORK MORE __________
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DIFFICULT - BECAUSE OF FRICTION WE NEED TO INCREASE FORCE FOR WORK TO TAKE PLACE
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WHAT SIMPLE TOOL SPREADS OUT FORCE OVER A LONGER DISTANCE?
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INCLINED PLANE
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ANYTHING THAT USES TWO OR MORE SIMPLE TOOLS IS CALLED?
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A COMPLEX MACHINE
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EXAMPLES OF A WHEEL AND AXLE INCLUDE:
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-STEERING WHEEL
-A WATER WHEEL -DOORKNOB |
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THE AMOUNT OF FRICTION DEPENDS UPON WHAT?
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THE AMOUNT OF FORCE BETWEEN THE TWO OBJECTS OR SURFACES. THEREFORE, HEAVIER OBJECTS CREATE MORE FRICTION WHEN BEING MOVED.
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AN INCLINED PLANE HAS A _____ SURFACE USED TO _____ A LOAD
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SLANTED
RAISE |
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THE SIX BASIC TOOLS ARE:
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INCLINED PLANE, WEDGE, SCREW, LEVER, WHEEL AND AXLE, AND PULLEY
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IN A CLASS ONE LEVER, THE FULCRUM IN LOCATED WHERE?
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BETWEEN THE LOAD AND EFFORT, DIVIDING THE LEVER (BAR) INTO TWO SIDES
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WORK IS INCREASED IN TWO WAYS
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-AN INCREASE IN THE WEIGHT OF THE LOAD
-AN INCREASE IN THE DISTANCE MOVED |
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THE FORCE USED TO PUSH A LOAD ON AN INCLINED PLANE IS CALLED:
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THE INPUT FORCE
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TOOLS DO WHAT TO FORCE?
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-MAGNIFY FORCE
-ALTER THE DIRECTION OF THE FORCE |
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A FIXED PULLEY CHANGES THE DIRECTION OF WHAT?
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THE INPUT FORCE
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WORK IS DEFINED AS (FORMULA)
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FORCE X DISTANCE = WORK
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IN A CLASS ONE LEVER THE SIDE THAT HOLDS A LOAD IS CALLED?
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THE LOAD ARM
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FRICTION CAN BE DECREASED IN TWO WAYS
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-LUBRICATION
-WHEELS |
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WHERE IS THE FORCE APPLIED TO A CLASS THREE LEVER?
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BETWEEN THE FULCRUM AND THE LOAD
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FRICTION IS GREATEST WHEN?
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JUST BEFORE AN OBJECT MOVES
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IN A CLASS ONE LEVER, THE SIDE THAT FORCE IS APPLIED TO IS CALLED?
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THE EFFORT ARM
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IN ORDER FOR WORK TO TAKE PLACE _____________________
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A FORCE MUST ACT ON A LOAD AND MOVE IT
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TRUE/FALSE
A FIXED PULLEY CAN HAVE MORE THAN ONE WHEEL IN THE SYSTEM |
TRUE
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WHAT IS A LOAD?
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THE OBJECT TO BE MOVED
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LIST SOME EXAMPLES OF A WEDGE
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-PLOW
-ZIPPER -SCISSORS -AX -DOOR STOP |
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STARTING FRICTION HAS:
1. MOST FRICTION 2. LESS FRICTION 3. LEAST FRICTION |
1. MOST FRICTION (GREATEST AMOUNT OF FRICTION)
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WHEEL AND AZLE - WHEN THE WHEEL TURNS, DOES THE AXLE TURN OR STAND STILL?
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THE AXLE TURNS
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SLIDING FRICTION HAS:
1. MOST FRICTION 2. LESS FRICTION 3. LEAST FRICTION |
2. LESS FRICTION
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HOW DOES FORCE EFFECT A WEDGE?
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WHEN FORCE IS APPLIED TO THE THICK END OF THE WEDGE, THE POINTED END WILL GO UNDER OR INTO AN OBJECT
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IN A CLASS ONE LEVER, IN WHAT DIRECTION DO THE LOAD AND EFFORT MOVE? (SAME OR OPPOSITE DIRECTION)
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OPPOSITE
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EXAMPLES OF SCREWS:
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-FAUCET
-DRILL -VICE -NUTS/BOLTS |
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IN THE SIMPLE TOOL -WHEEL AND AXLE - THE GREATEST USE OF THE WHEEL IS WHAT?
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TO REDUCE FRICTION
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IDEAL MECHANICAL ADVANTAGE OF A SCREW =
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DISTANCE TO COMPLETE 1 TURN
____________________________ DISTANCE BETWEEN 2 THREADS |
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EXAMPLES OF CLASS ONE LEVERS INCLUDE:
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-SEESAW
-BALANCE SCALE -BOAT OAR -PLIERS -SCISSORS |
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WHAT ARE THE 2 PARTS TO A LEVER?
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-A BAR
-A FULCRUM |
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IN A CLASS TWO LEVER, THE EFFORT AND THE LOAD MOVE IN WHAT DIRECTION? (OPPOSITE OR SAME DIRECTION)
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SAME DIRECTION
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FRICTION (HELPS OR HURTS)SCREWS TO DO THEIR WORK.
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HELPS
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WHERE IS THE FULCRUM ON A CLASS TWO LEVER?
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ALWAYS ON ONE END
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THE DISTANCE BETWEEN THE THREADS OF A SCREW ARE CALLED?
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THE PITCH
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EXAMPLES OF CLASS THREE LEVERS INCLUDE:
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-RAKE
-FISHING POLE -TWEEZER -HAMMER HITTING A NAIL |
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A SCREW IS A SIMPLE TOOL MADE FROM:
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AN INCLINED PLANE WRAPPED AROUND A CYLINDER
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EXAMPLES OF CLASS TWO LEVERS INCLUDE:
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-NUTCRACKER
-WHEELBARROW -PAPER CUTTER -BOTTLE OPENER |
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WHEN A DRIVE WHEEL GEAR TURNS IT CAUSES WHAT?
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IT CAUSES THE GEAR NEXT TO IT TO TURN
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A PULLEY IS A SIMPLE TOOL. IT CAN BE DESCRIBED AS:
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A WHEEL WITH A ROPE THAT RUNS ALONG THE GROOVE OF THE WHEEL
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EXPLAIN RACK AND PINION GEARS
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THEY HAVE ONE WHEEL AND A RACK WITH TEETH. THEY MOVE BACK AND FORTH INSTEAD OF AROUND
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EXAMPLES OF FIXED PULLEYS INCLUDE:
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-RAISING CURTAINS
-RAISING BLINDS -RAISING SAILS |
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ANOTHER NAME FOR THE COMPOUND PULLEY IS WHAT?
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A BLOCK AND TACKLE
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IN A CLASS ONE LEVER, IF THE FULCRUM IN MOVED CLOSER TO THE LOAD, OR THE LOAD MOVES CLOSER TO THE FULCRUM WHAT HAPPENS TO THE AMOUNT OF FORCE?
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THE AMOUNT OF FORCE NEEDED TO LIFT THE LOAD IS DECREASED
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EXPLAIN SPUR GEARS
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THEY ARE ROUND, LIE NEXT TO EACH OTHER, MAGNIFY FORCE, REVERSE DIRECTION
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WHEEL AND AXLE -
THE TURNING OF THE WHEEL IS THE: |
INPUT FORCE
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EXPLAIN BEVEL GEARS
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THEY COME TOGETHER AT AN ANGLE, CHANGING FORCE AND DIRECTION
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WHAT IS A CRANK?
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IT IS A WHEEL WITH A ROD ATTACHED TO IT. THE OTHER END OF THE ROD IS HINGED SO THAT THE ROD MOVES BACKWARDS AND FORWARD AS THE WHEEL MOVES
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GEARS:
DRIVE WHEELS CAN MAKE SMALLER WHEELS TURN _____ |
FASTER (THEY CAN MAKE LARGER WHEELS TURN SLOWER)
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THE TEETH OF THE GEARS ARE CALLED?
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COGS
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GEARS ARE __________________
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WHEELS WITH TEETH ALONG THE OUTER EDGE
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WHEN USING A MOVEABLE PULLEY, A LOAD TRAVELS HLAF THE DISTANCE OF THE EFFORT. SO FOR EVERY FOOT YOU WANT THE LOAD TO LIFT, YOU MUST PULL HOW MUCH ROPE?
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YOU MUST PULL THE ROPE TWO FEET
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A COMPOUND PULLEY IS MADE FROM ______________________
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ONE FIXED PULLEY AND ONE MOVEABLE PULLEY
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EXPLAIN WORM GEARS
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THEY HAVE A WHEEL ON A SCREW THREAD TO CHANGE THE FORCE AND THE DIRECTION
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SPRINGS HAVE 3 MAIN USES IN MACHINES:
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1.TO RETURN SOMETHING TO ITS PREVIOUS POSITION
2.USED IN WEIGHING MACHINES 3. USED TO STORE ENERGY |
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IN A MOVEABLE, THE FORCE NEEDED TO LIFT A LOAD EQUALS _____THE WEIGHT OF A LOAD.
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HALF
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WHAT IS A CAM?
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A WHEEL AND AXLE WITH AN EXTENSION ATTACHED TO THE WHEEL (WHEEL WITH A BUMP)
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