Couples
المؤلف:
GEORGE A. HOADLEY
المصدر:
ESSENTIALS OF PHYSICS
الجزء والصفحة:
p-60
2025-11-02
31
The parallel forces P and shown in Fig. 1. can be replaced by a single force, R, or counterbalanced by a single force, E. Parallel forces, however, can be applied to a body in such a way that neither of these things can be done. If the parallel forces are equal and in opposite
Fig. 1
directions, their resultant is zero so far as motion of translation is concerned, but they tend to turn the bar AB (Fig. 2) into the position shown by the dotted lines. This combination of forces is called a couple and produces rotation only.
FIG.2
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