No.
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Mechanical Equilibrium is the state in which 2 or More forces act on an object , and cancel each other out. There has to be an even number of forces for them to cancel each other out. So no, a single force will not achieve mechanical equilibrium.
if only a single nonzero force acts on an object, its motion will change and will not be in mechanical equilibrium. There would have to be other forces to result in a zero net force for equilibrium.
gravity
When only mechanical energy acts on an object, the total mechanical energy of the system is conserved. This means that the sum of the object's kinetic and potential energies remains constant, assuming no external forces or sources of energy are involved.
No, when only air resistance acts on an object, mechanical energy is not conserved. Air resistance dissipates the mechanical energy of the object by converting it into other forms of energy, such as heat and sound, causing the object to slow down and lose kinetic energy over time.
The object must be in equilibrium to be at rest or a constant speed.
the force of nature. e.g. when looking at concentration gradients it is nature that urges equilibrium on.
Mechanical energy is stored in objects through their positions or motion. Potential energy is stored in an object's position or shape, while kinetic energy is stored in an object's motion. When an external force acts on the object, this stored mechanical energy can be released and converted into other forms of energy.
Air resistance acts to slow an object that is accelerating, as the object impacts more and more air molecules per second, resulting in a greater negative force on the object, until an equilibrium point is reached.
Bob is a cow
Mechanical work is the transfer of energy that occurs when a force acts on an object and causes it to move. It is calculated by multiplying the force applied to the object by the distance over which the force is applied in the direction of the force. Work is measured in joules (J).