Скачать или смотреть The man balances on a horizontal bar while being supported

Which law of physics will apply to this?

The man balances on a horizontal bar while being supported by two other individuals, which demonstrates the principles of Mechanical Equilibrium and Newton's Laws of Motion, particularly the First and Third Laws.

Newton's First Law of Motion (Law of Inertia): An object at rest tends to stay at rest unless acted upon by an external force. In this case, the man and the bar are relatively at rest (not accelerating), indicating that the net external force acting on them is zero.

Mechanical Equilibrium: For an object to be
inequilibrium, two conditions must be met:
Translational Equilibrium: The net force acting on the object must be zero, meaning the sum of all upward forces equals the sum of all downward forces. The combined upward forces from the two supporting individuals must be equal to the total weight of the man and the bar.

Rotational Equilibrium: The net torque acting on the object must be zero, meaning the sum of all clockwise torques equals the sum of all counter-clockwise torques around any pivot point. This ensures the bar remains horizontal and doesn't rotate. The supporting individuals must apply forces at the right positions and magnitudes to prevent any rotational movement.

Newton's Third Law of Motion (Action-Reaction): For every action, there is an equal and opposite reaction. The man's weight exerts a downward force on the bar, and the bar exerts an equal and opposite upward force on the man. Similarly, the bar exerts downward forces on the hands of the supporting individuals, and their hands exert equal and opposite upward forces on the bar.

Therefore, the stability of the system relies on the forces being balanced to achieve both translational and rotational equilibrium, in accordance with Newton's laws of motion