Grade 9 Test on Mechanics 20241217 (id: c25b5a635)

[单选题]
If you push twice as hard agai(jaji -im. er+nst a stationary brick wall, the amount of work*4wff7s2 fu 7wx 0pfox yo fw7f0*wxffx 2 s4uo7pu do

A. doubles.
B. is cut in half.
C. remains constant but non-zero.
D. remains constant at zero.


参考答案:  D


本题详细解析: 暂无

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