hich 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.
Answers
Answer:
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).
Hope this Helps!!!