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Q: In the moment of forces, the non-coplanar forces are
  • A. The forces, whose lines of action lie on the same plane
  • B. The forces, whose lines of action lie on the same line
  • C. The forces which meet at one point but their lines of action do not lie in one plane
  • D. The forces, which meet at one point
Correct Answer: Option C - Coplanar forces–Forces whose lines of action lie on the same plane, are known as coplanar forces. Non-coplanar forces–Forces which meet at one point but their lines of action do not lie on the same plane are known as non-coplanar.
C. Coplanar forces–Forces whose lines of action lie on the same plane, are known as coplanar forces. Non-coplanar forces–Forces which meet at one point but their lines of action do not lie on the same plane are known as non-coplanar.

Explanations:

Coplanar forces–Forces whose lines of action lie on the same plane, are known as coplanar forces. Non-coplanar forces–Forces which meet at one point but their lines of action do not lie on the same plane are known as non-coplanar.