Moments Flashcards
What are moments?
The rotational/turning effect of a force
M = Fd tells us what about how to maximise a moment?
To achieve the biggest moment we should apply maximum force at maximum perpendicular distance to the pivot.
In levers there’s always an
input force and an output force - this means that the input force is the force applied by the user to the lever. The output force is the force applied by the lever to the object.
If the input force and output force are on the same side of the pivot…
they act in the same direction.
If the input and output force are on different sides of the pivot…
they act in opposite directions.
The output force is generally closer to the pivot so…
it is a larger force. The force we put “into” a lever is smaller in comparison to the output force created.
Gear systems allows the turning effect of an engine to be….
transferred to other gears and the wheels.
If gear A is connected to the engine, and gear B has a 2 times larger radius than A, then the turning effect of the engine has been…
doubled as it passes to the wheels, so less energy is used for a greater effect, conserving energy.
