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What is Statics Of A Particle about?

When we speak of a body as a ' particle' we merely mean to indicate that for the time being we are not concerned with its actual dimensions, so that its position may be adequately represented by a mathematical point. There is no implication that the dimensions are infinitely small, or even that they are small compared with ordinary standards. All that is in general essential is that they should be small compared with the other linear magnitudes which enter into the particular problem. In physical astronomy, for instance, even such vast bodies as the Earth, the other planets, and the Sun can for many purposes be treated as material particles, their actual dimensions being negligible compared with their mutual distances.A ' force' acting on a particle is conceived as an effort, of the nature of a push or a pull, having a certain direction and a certain magnitude. It may therefore, for mathematical purposes, be sufficiently represented by a straight line AB drawn in the direction in question, of length proportional (on some convenient scale) to the magnitude of the force. In other words, a force is mathematically of the nature of a vector. The force is to be regarded of course as acti

Author

Horace Lamb

Publisher

Cambridge University Press

Published

2009

Language

EN