試題詳解

37. The aluminum cylinder is 0.10 m² (cross-sectional area) and 0.35 m long. What is the force exerted on its ends if the elongation is0.20 mm? (Young’s modulus of aluminum is 7.0 × 10¹⁰ Pa)
(A) 2.00 × 106 N
(B) 4.00 × 10⁶ N
(C) 8.00 × 10⁶ N
(D) 4.00 × 10³ N
(E) 2.00 × 10³ N