物理 - 2026 进行中

科目: 物理
级别: IX
类别: 大学生
测试题目: 英语
问题示例: A particle moves in one dimension according to x(t) = 3t^3 − 2t^2 + 5, where x is in metres and t is in seconds. What is its acceleration at t = 2 s? 24 m/s², 32 m/s², 36 m/s², 40 m/s²