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

Assume that the side walls are light, you can use the equation P = F / A

where P is pressure,

F is force, and

A is area.

The total contact area is 4 * 0.024 m^2 = 0.096 m^2. The pressure is 2.0 * 10^5 Pa. Solving:

P = F / A

P * A = F

F = (2.0 * 10^5 Pa) * (0.096 m^2)

F = 19200 N

The weight of the car is 19200 Newtons.