Two forces whose lines of action lie in a plane are called

Two forces whose lines of action lie in a plane are called

• A. non-coplanar
• B. intersecting
• C. coplanar
• D. skew

Answer: (C)

Coplanar forces occur when their lines of action lie in the same plane. In three-dimensional space, two lines lie in a common plane if they either intersect or are parallel, which means you can analyze the forces within that single plane. If the lines of action do not share a plane, the forces are non-coplanar; a familiar non-coplanar situation is described by skew lines, which do not intersect and are not in the same plane. Since the two forces have lines of action that lie in one plane, they are coplanar.

Coplanar forces occur when their lines of action lie in the same plane. In three-dimensional space, two lines lie in a common plane if they either intersect or are parallel, which means you can analyze the forces within that single plane. If the lines of action do not share a plane, the forces are non-coplanar; a familiar non-coplanar situation is described by skew lines, which do not intersect and are not in the same plane. Since the two forces have lines of action that lie in one plane, they are coplanar.