Quotation from: General Science

Written by: Bertha M. Clark


Cogwheels can be made to give speed at the decrease of force. A heavy
weight _W_ attached to _B_ will in its slow fall cause rapid rotation
of _A_, and hence rapid rise of _P_. It is true that _P_, the load
raised, will be less than _W_, the force exerted, but if speed is our
aim, this machine serves our purpose admirably.


An extremely important form of wheel and axle is that in which the two
wheels are connected by belts as in Figure 114. Rotation of _W_
induces rotation of _w_, and a small force at _W_ is able to overcome
a large force at _w_. An advantage of the belt connection is that
power at one place can be transmitted over a considerable distance and
utilized in another place.

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