It says 'above horizontal', i.e. partly upwards, not downwards.Benny851 said:
Yes.
Benny851 said:
The force required to push a box across a horizontal floor depends on the mass of the box and the coefficient of friction between the box and the floor. The formula to calculate this force is F=μmg, where F is the force, μ is the coefficient of friction, m is the mass of the box, and g is the acceleration due to gravity.
The force required to push a box across a horizontal floor increases with the mass of the box. This is because the weight of the box increases with its mass, and the force required to overcome the weight also increases.
The coefficient of friction is a measure of the resistance between two surfaces in contact. The higher the coefficient of friction, the greater the force required to push a box across a horizontal floor. This is because a higher coefficient of friction means there is more resistance between the box and the floor.
The surface of the floor can affect the force required to push a box in two ways. First, a rougher surface will have a higher coefficient of friction, making it more difficult to push the box. Second, a smoother surface may have less friction, but it can also be more slippery, requiring more force to keep the box moving in a straight line.
Yes, there is a limit to how much force can be applied to push a box across a horizontal floor. This is because the coefficient of friction can only withstand a certain amount of force before the box starts to slide. This limit is known as the maximum static friction force, and it is equal to the product of the coefficient of friction and the normal force acting on the box.