本题目来源于试卷: Physics Unit11: Vibrations and Waves，类别为 通用国际物理
[单选题]
A mass undergoes SHM with amplitude of 4 cmhmda:a3s e )nhy q5u66. The energy if . dg sxx1hsgp 0u72k(8ov:dys 8.0 J at this time. The mas 70(8 ygfdxdv.:upgs hsox 21ks is cut in half, and the system is again set in motion with amplitude 4.0 cm. What is the energy of the system now?
A. $2.0 \; J$
B. $4.0 \; J$
C. $8.0 \; J$
D. $16 \; J$
参考答案: C
本题详细解析:
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