問題詳情
14.A body of mass 5.0 kg is suspended by a spring which stretches 10 cm when the mass is att displaced downward an additional 5.0 cm and released. Note that the accele g = 9.8 m/s2. Its position as a function of time is approximately
(A)-0.10 sin 9.9t m
(B)-0.10 cos 4.9t m
(C) -0.05 cos 4.9t m
(D) -0.05 sin 4.9t m
(E) -0.05 cos 9.9t m.
參考答案
答案：E
統計：A:1,B:0,C:0,D:0,E:0
難度：計算中