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Bob de Hilster
Gravity Group

Date: 2011-03-20 Time: 07:00 - 09:00 US/Pacific (1 decade 6 months ago)
America/Los Angeles: 2011-03-20 07:00 (DST)
America/New York: 2011-03-20 10:00 (DST)
America/Sao Paulo: 2011-03-20 11:00
Europe/London: 2011-03-20 14:00
Asia/Colombo: 2011-03-20 19:30
Australia/Sydney: 2011-03-21 01:00 (DST)

Where: Online Video Conference
Recording Playback
This video conference used DimDim, now a private company.
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Rati Ram Sharma
Centripetal & centrifugal forces
1 decade 7 months ago [2011-01-31 03:58:14]
Since a force equals the product of mass and acceleration, the acceleration goes with the force. For the circular motion of radius r of a body of mass m at a tangential constant velocity V the attendant continuous change of direction of motion inward creates a centripetal acceleration        -V^2/r inward associated with the centripetal force -mV^2/r, which is equally opposed by a centrifugal force +mV^2/r outward, the two together keeping the body at rest radially. The corresponding centripetal and centrifugal mechanical forces remain un-manifested without creating body's radial motion inward or outward.The tangential velocity V remains constant without acceleration indicating absence of the associated tangential component of the force. At the instant of snapping its connection the moving body flies away tangentially with the velocity V due to inertia of motion and both the centripetal and centrifugal forces disappear instantly. Thus both centripetal and centrifugal mechanical forces are real though remain un-manifested and there is no tangential component of the force to accelerate the constant tangential velocity.