Machines Summary Flashcards by Sarah Shepherd

Q

Pivot

A

Fixed point

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Q

Effort

A

Where you apply force

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Q

Load

A

The force you need to lift/move

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Q

When a system is balanced

A

ACW MOMENT=CW moment

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Q

Moment

A

Turning effect of a force about a fixed point

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Q

Moment =

A

Force x distance

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Q

Machines can magnify

A

-force
-distance
-speed
-torque

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Q

Force

A

Lever/tweezers/pulleys

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Q

Distance

A

Catapults

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Q

Speed

A

Gears

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Q

Torque

A

Gears

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Q

Effort=

A

Load force divided by number of ropes

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Q

Length of rope pulled through=

A

Height raised x no of ropes

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Q

Archimedes

A

Scr moving water
Sea defence(pulleys)

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Q

Ancient Chinese

A

Catapults/ trechubet etc

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