Um bloco de madeira tem 0,6 m x 0,6 m x 0,6 m, se ele tem 72 kgf de peso determine a pressão que ele exerce sobre a superfície de apoio

Explicación:

La presión ejercida sobre la superficie de apoyo se expresa como;

Presión = Fuerza / área de sección transversal

Dado

Peso = 72kgF

Superficie = 2LW + 2LH + 2WH

Superficie = 2 ((6) (6) +2 (6) (6) +2 (6) (6)

Superficie = 2 (36 + 36 + 36).

Superficie = 2 (108)

Superficie = 216m²

Haz que se ejerza la presión

Presión = 720/216

Presión = 3.33Pa

there are no correct statementd on the list of choices you provided.

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.