If the system of coplanar forces are in equilibrium then the resultant forces is equal to bit answwer
Answers
Forces acting in the same plane are called coplanar forces. In Figure 1.3 (a), forces a
and 6 are acting in vertical plane ABCD. They are called coplanar forces. Forces c and 2
are also called coplanar forces as they are acting in one plane. But forces a and care not
coplanar forces as they are acting in two different planes. If all the forces acting on a body
meet at a point, they are called concurrent forces. Forces a, 6 and 2 shown in - - Figure 1.3 (b) are concurrent forces as they are meeting at point 0 whereas forces d , e
and fare called as non-concurrent forces because all the three forces are not meeting at
a point.
~oblanar forces can also be classified as parallel forces and non-parallel forces. If the
lines of action of forces are parallel then the forces are called parallel forces. If the forces
point the same direction they are called like parallel forces and if they point in opposite
directions, they are called unlike parallel forces. Forces p and are like parallel forces,
whereas and r or p and r are unlike parallel forces as shown in Figure 1.3 (c). Forces s, i
and u are non-parallel forces. Concurrent forces are non-parallel forces. But non-parallel
forces may be concurrent or non-concurrent.