Lecture
Consider the action of an external force. applied to a mass point . During elementary mass goes way Work force on this path is determined by the projection of the force on the direction of movement, which is obviously equal to the tangential component strength
But equal to the modulus of the moment strength relative to the axis of rotation. Job and will be positive if has the same direction as negative if the direction of the vectors and opposite.
Given that
The work of all forces applied to the body
(5.13) |
Complete work
(5.14) |
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Physical foundations of mechanics
Terms: Physical foundations of mechanics