- #1
emohabatzadeh
- 5
- 0
1.we know that generally, every force systems can be replaced by a resultant force(R) and a couple(M) at a point O. the position of point O is optional.
but magnitude and direction of M is dependent to this point while magnitude and direction of R is independent.
In static equilibrium R and M are zero at an optional point O. now this is the question:
2.While M is zero at an optional point O, why should we conclude that M would be zero at every point chosen( infinite in number of points)...pay attention that " magnitude and direction of M is dependent to the point chosen"...
but magnitude and direction of M is dependent to this point while magnitude and direction of R is independent.
In static equilibrium R and M are zero at an optional point O. now this is the question:
2.While M is zero at an optional point O, why should we conclude that M would be zero at every point chosen( infinite in number of points)...pay attention that " magnitude and direction of M is dependent to the point chosen"...