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 cm. 7dq m-iw-.a c)el5lvplg9n ii( 84qs:m zfw 3tThe energy9u o cly+,tyd6v8yd 4z is 8.0 J at this time. The mass is cut in half, and the system is again set in motion with amplitude 4.0 cm. What is9y, 4zdd8ctoyl6+uyv 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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