Coplanar parallel forces are forces that lie in the same plane and have the same line of action but different points of application. The conditions for coplanar parallel forces are that they must have the same direction, be non-collinear (not acting along the same line), and have magnitudes that are proportional to their distances from a common point. These forces create a system in which the net force is equal to the vector sum of all the individual forces.
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1- the forces must act parallel to each other not at the same line of action
2- if they form an angle then you must make resoltution and take the force which is prependicular to theline joining between the point of action
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No, non-coplanar lines are not skew. Skew lines are non-coplanar lines that do not intersect and are not parallel. Non-coplanar lines are simply lines that do not lie in the same plane. Skew lines, on the other hand, are non-coplanar and not parallel, making them a specific subset of non-coplanar lines.
Not necessarily. The Tropic of Cancer, and the Tropic of Capricorn, imaginary lines on the surface of the earth (an approximate sphere), are parallel but they are not coplanar. You could draw similar lnes on a proper sphere that were parallel but not coplanar.
Coplanar forces are a set of forces all of which act in the same plane. Non-coplanar forces are a set of forces in which at least one act in a direction incline to the plane formed by two of the forces.
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