A man lifts a heavy stone using a bar supported at a stationary point.
Which phenomena in daily life in terms of the scientific principles
The phenomenon being described in this situation is the concept of leverage. Leverage is a scientific principle that involves using a lever or a rigid bar to multiply the force applied to an object. It allows us to exert a greater force on one end of the bar to overcome a larger resistance on the other end.
In this case, the man is using a bar as a lever to lift a heavy stone. By placing the fulcrum (the stationary point) in a specific position, the man can take advantage of the principle of leverage to make it easier to lift the stone. When the fulcrum is closer to the stone than to the man, he can exert a smaller force on the longer end of the bar to produce a larger force on the shorter end, effectively multiplying his force and making it possible to lift the stone.
This principle is commonly seen in various daily life scenarios, such as using a crowbar to pry open a stuck door, using a see-saw or a playground swing, or even using a pair of pliers to grip and turn objects. Leverage is a fundamental concept in physics and mechanical engineering that allows us to generate more force or exert less effort when dealing with heavy or resistant objects.