Levers & Gears (Edexcel GCSE Physics): Flashcards
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Practise the cards
13 cards from this deck
Purpose of levers & gears
Purpose of levers & gears
Reduce effort needed by decreasing force required
How levers work
How levers work
Increase moment by making force act farther from pivot
Moment (definition)
Moment (definition)
Turning effect of a force
Pivot (in a lever)
Pivot (in a lever)
Point the lever turns around
Effect of longer spanner on moment
Effect of longer spanner on moment
Increases the moment
When moment is greatest on a lever
When moment is greatest on a lever
When force applied at right angle (perpendicular)
Effect of longer spanner on force needed
Effect of longer spanner on force needed
Decreases the force needed
What gears can change
What gears can change
Speed, force, or direction by rotation
1st gear → smaller gear: speed effect
1st gear → smaller gear: speed effect
Second gear turns faster
1st gear → smaller gear: force effect
1st gear → smaller gear: force effect
Second gear has less force
1st gear → larger gear: speed effect
1st gear → larger gear: speed effect
Second gear turns slower
1st gear → larger gear: force effect
1st gear → larger gear: force effect
Second gear has more force
Direction of second gear relative to first
Direction of second gear relative to first
Always turns in opposite direction