A wooden block slides on a horizontal wooden board, then its mass is increased by placing a load
A wooden block slides on a horizontal wooden board, then its mass is increased by placing a load on top, as in this case the force of gravity, the friction force and the coefficient of friction change.
The force of gravity is determined by the formula: F gravity = m * g, where g is the acceleration of gravity (constant value), m is the mass of the body. Since, according to the condition of the problem, the body weight is increased (a load was placed on the bar), then according to the formula, the force of gravity will also increase.
The friction force is determined by the formula: F friction = k * N. In this case, the bar slides on a horizontal surface, which means N = F gravity = m * g, or F friction = k * m * g. Since, according to the condition of the problem, the body weight is increased (a load was placed on the bar), then according to the formula, the friction force acting on the bar will also increase.
The coefficient of friction k is a constant value that depends on the properties of the substance of which the body is composed. Therefore, it will remain unchanged.
Answer: if you put a load on the block, then the force of gravity and the force of friction will increase, the coefficient of friction will remain unchanged.
