Which of the following best describes a body in equilibrium?
a. it is standing upright.
b. all forces acting on a body are balanced.
c. the force of gravity has been overcome.
d. no forces are acting on the body.

The answer would be B all forces acting on a body are balanced

Option B is correct.

All forces acting on a body are balanced.

Explanation:

Equilibrium of bodies is concept that describes the the state of a body at rest or in uniform motion. For this body, there is no net force acting on it as the resultant of all forces on it is zero.

Mathematically, for a body in equilibrium,

Σ F = 0

it can be broken down further into

Σ Fₓ = 0, Σ Fᵧ = 0

indicating That, in all directions and axis, a body in equilibrium has all the forces acting on it balanced out.

It is easy to see how only option B is completely correct amongst the option now.

- A body in equilibrium does not necessarily have to be standing upright; it could be at rest or in a state of constant, uniform motion.

- The force of gravity is not just overcome, it is present but it would be balanced out by another force.

- No forces acting on the body. This is very limiting, forces can in fact be acting on a body in equilibrium. The right way to put this is that no net force is acting on the body (as all the forces are balanced out).

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