Levers & Gears (OCR GCSE Physics A (Gateway Science Suite)): Flashcards
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Practise the cards
15 cards from this deck
Purpose of levers & gears
Purpose of levers & gears
Make tasks easier by reducing effort/force needed
How do levers increase moment?
How do levers increase moment?
Make force act farther from pivot
What is the pivot in a lever?
What is the pivot in a lever?
Point the lever turns around
Example of a lever
Example of a lever
Spanner
Effect of longer spanner on moment
Effect of longer spanner on moment
Increases the moment
When is moment greatest on a lever?
When is moment greatest on a lever?
When force applied perpendicular (at right angle)
Effect of longer spanner on force needed
Effect of longer spanner on force needed
Reduces force needed
What does increasing spanner length increase?
What does increasing spanner length increase?
Perpendicular distance from pivot
What can gears change?
What can gears change?
Speed, force, or direction
1st gear to smaller gear: speed effect
1st gear to smaller gear: speed effect
Second gear turns faster
1st gear to smaller gear: force effect
1st gear to smaller gear: force effect
Second gear has less force
1st gear to larger gear: speed effect
1st gear to larger gear: speed effect
Second gear turns slower
1st gear to larger gear: force effect
1st gear to larger gear: force effect
Second gear has more force
Direction of second gear vs first
Direction of second gear vs first
Always opposite direction
Why does larger secondary gear increase force?
Why does larger secondary gear increase force?
Force acts further from pivot, creating greater moment