Which of newton's laws accounts for the following statement? "a force cannot act alone." first law second law third law

Newton's laws A force cannot act  alone is the THIRD LAW!

"A force cannot act alone" is a statement that belongs to Newton's Third Law, because the forces act in pairs (action and reaction).

Explanation:

Newton's First Law, also called the Law of inertia, indicates that "The whole body perseveres in its state of rest or uniform rectilinear motion, unless the sea is forced to change its state by forces printed on it." This means that for a body to leave its state of rest or the motion, it is necessary for a force to act on it.

Newton's Second Law, also called the Fundamental Law of Dynamics, indicates that: "The change of motion is directly proportional to the printed driving force and occurs along a straight line along which that force is printed." This means that the acceleration of a moving object depends on the amount of force that is applied at a given time, in order to modify its trajectory or speed.

Newton's Third Law is also known as the Principle of action and reaction. This law indicates that “Every action has an equal reaction but in the opposite direction” This means that when a body exerts a force (action) on another, it responds with a force of equal magnitude although opposite direction (reaction). Then this law explains the forces that always occur in the form of peers: an action and a reaction.

Finally "A force cannot act alone" is a statement that belongs to Newton's Third Law, because the forces act in pairs (action and reaction).

in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.