You measure the pressure of the four tires of your car each to be 35 pounds per square inch (psi). You then roll your car forward so that each tire is upon a sheet of paper. You outline the surface area of contact between each tire and the paper, which you later measure to be 30.0 square inches. What is the weight of your car?

Question

Quizplus · Accepted Answer

The weight of the car is the total force exerted by the tires on the ground. Since each tire has a pressure of 35 psi and a contact area of 30 square inches, the force per tire is 35 psi * 30 square inches = 1050 pounds. With four tires, the total weight is 1050 pounds/tire * 4 tires = 4200 pounds.

You Measure the Pressure of the Four Tires of Your