The mass of the car is 900 kg, and the contact area of the tire with the road is 225 cm2,

The mass of the car is 900 kg, and the contact area of the tire with the road is 225 cm2, how much pressure does the car put on the car?

m = 900 kg.

g = 10 m / s2.

S1 = 225 cm2 = 0.0225 m2.

n = 4.

P -?

Pressure P is called a scalar physical quantity equal to the ratio of the force F to the area S, on which this force acts: P = F / S.

The car acts on the surface of the earth by the force of its weight, the value of which is expressed by the formula: F = m * g, where m is the mass of the car, g is the acceleration of gravity.

Since the car has n wheels, and the area of ​​contact of one wheel with the ground is S1, then S = n * S1.

The formula for determining the pressure of the car will take the form: P = m * g / n * S1.

P = 900 kg * 10 m / s2 / 4 * 0.0225 m2 = 100000 Pa.

Answer: the car pressure is P = 100000 Pa.