Question

A system of three forces acts on a body and keeps it in equilibrium. Identify the forces need to be​

Answer 1

Answer:

If a body is in rotational equilibrium under the action of three force , the lines of action of the three forces must be either concurrent of parallel.

Answer 2

Answer: The system of three forces are concurrent.

Step-by-step explanation:

A body is said to be in static equilibrium if it is either moving with constant velocity or it is at rest. When the vector sum of the external forces working on the body is zero, the body is in equilibrium.

This state of equilibrium continues as long as the sum of the  forces  applied to the body remains zero. This corresponds to  Newton’s Law of Inertia: “All bodies will maintain their  state of rest or of uniform motion in a straight line that they are already in, unless acted upon by a force that would cause them to change their  state of motion.”

• The lines of action are coplanar (in the same plane).

• The lines of action are convergent (they cross at the same point).

• The vector sum of these forces is equal to the zero vector.

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