Question

A car has four tires that are each inflated to an absolute pressure of 2.0 x 10^5 Pa. Each tire has an area of 0.024 m^2 in contact with the ground. How much does the car weigh?
a.

1.9 x 10^3 N

b.

2.9 x 10^4 N

c.

1.2 x 10^3 N


d.

1.9 x 10^4 N

Answer 1

Answer:

=72000 Newtons

Explanation:

Pressure=Force/Area

Thus, Force= Pressure×Area

In this scenario, the weight of the car is the force.

The total absolute pressure in the tires is :2×10⁵Pa×4=8×10⁵ Pa

The total area in contact with the ground is:0.024m²×4=0.096m²

Thus the weight of the car=(8×10⁵Pa)×0.096m²

=72000 Newtons