can a pendulum swing perpetually in vacuum?

Subject: can a pendulum swing perpetually in vacuum?

Date: Sat Aug 19 09:59:47 2000
Posted by wongyuanrui
Grade level: 10-12 School: raffles institution
City: No city entered. State/Province: No state entered. Country: singapore
Area of science: Physics
ID: 966693587.Ph

Message:


hello...

i know the reason why pendulums stop swinging after some time in air is 
because of air resistance.
what if we set a pendulum swinging in vacuum?
will it swing forever?
if so, wouldn't we have created perpetual motion?
is perpetual motion possible?

thanks for answering my question.

Re: can a pendulum swing perpetually in vacuum?

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