Block and Tackle HO Debrief Tahoma Jr. High 8 th Grade Science Maple Valley, WA.
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Block and Tackle HO Debrief Tahoma Jr. High 8 th Grade Science Maple Valley, WA
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EXTENSION QUESTION: So, why does it seem easier when using only 1 pulley when there’s no change in effort or amount of rope pulled? Because by changing the direction to pull down you are allowing gravity to work with you instead of against you if you tried pulling it straight up without a pulley. INVERSE end show
Transcript of Block and Tackle HO Debrief Tahoma Jr. High 8 th Grade Science Maple Valley, WA.
Block and Tackle HO
Debrief
Tahoma Jr. High8th Grade ScienceMaple Valley, WA
# of pulleys = MechanicalAdvantage
Resistance distance
(cm)how far object
moves
Effortdistance
(cm)how much
rope is pulled
Resistanceforce
(Newtons)how much
weight is lifted
Effortforce
(Newtons)how much
effort required to lift it
1 120 3,000
2 120 3,000
3 120 3,000
4 120 3,000
5 120 3,000
6 120 3,000
360
120
240
480
600
720
3,000
1,500
750
1,000
600
500
EXTENSION QUESTION:So, why does it seem easier when using only 1 pulley when there’s no change in effort or amount of rope pulled?
Because by changing the direction to pull down you are allowing gravity to work with you instead of against
you if you tried pulling it straight up without a pulley.
INVERSE
end show
