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If a body is acted upon by a number of coplanar non-concurrent forces, it may
  • a)
    rotate about itself without moving
  • b)
    move in any one direction rotating about itself
  • c)
    be completely at rest
  • d)
    all of these
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
If a body is acted upon by a number of coplanar non-concurrent forces...
If all the forces in a system lie in a single plane and the lines of action of all the forces do not pass through a single point, the system is said to be a coplanar non-concurrent force system.
The Result of a non-concurrent force system is the one which will have the same rotational and translatory effect as the given system of forces. It may be a single force, a pure moment of a force and a moment.
When a body is acted upon by a number of coplanar non-concurrent forces. A little consideration will show, that as a result of these forces, the body may have any one of the following states:
1. The body may move in any one direction.
2. The body may rotate about itself without moving.
3. The body may move in any one direction and at the same time, it may also rotate about itself.
4. The body may be completely at rest.
For Equilibrium of coplanar non-concurrent force system:
ΣFx = 0
ΣFy = 0
ΣM = 0
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If a body is acted upon by a number of coplanar non-concurrent forces, it maya)rotate about itself without movingb)move in any one direction rotating about itselfc)be completely at restd)all of theseCorrect answer is option 'D'. Can you explain this answer?
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