解： 01E=3=3x4.0x1092ne0r =1.96×104J (2) A-Bx-EM Bxa-Jo E=2a3=2×4.0x1028 =2.06×103J A=E2-Ek=2.06×103-1.96×104 =-1.7×104J 飞轮作功为：1.7×104J 结束目录=1.96×104 J E J 2 2 1 k2= ω2 ×4.0×103 10 60 2 = (2π ) 2 1 =2.06×103 J A = E k2 E k1 = 2.06×103 1.96×104 = 1.7×104 J E J 2 2 1 A = E k2 E k1 k2= ω2 (2) 解： E J 2 2 1 k1= ω1 ×4.0×103 30 60 2 = (2π ) 2 1 (1) 飞轮作功为：1.7×104 J 结束 目录