試題詳解

37. The four tires of an automobile are inflated to a gauge pressure of 2.0 × 105 N/m² (29 psi). Each of the four tires has an area of 0.024 m² that is in contact with the ground. Determine the weight of the auto.
(A) 4.80 × 10³N
(B) 1.92 × 10⁴N
(C) 7.68 × 10⁴N
(D) 8.33 × 10⁶N
(E) 2.08 × 10⁷N