Grade 9 Test on Mechanics 20241217 (id: 164ac2402)

[单选题]
A skier, of mass 40 kg, pushes off the top of a t4tzb+v l3 nohmym+.-hill witiadrjvz 0/p0 4h an initial speed of 4.0 m0z da/p4ri j0v/s. Neglecting friction, how fast will she be moving after dropping 10 m in elevation?

A. 7.3 m/s
B. 15 m/s
C. 49 m/s
D. 196 m/s


参考答案:  B


本题详细解析: 暂无

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