Physics Unit26: Special Theory of Relativity (id: 5779cc394)

[单选题]
A boat can travel 4.0 m/s in still water.7.v qc7b 2.zkgtcc+z y With what speed, relative to *4oqv*z jgiyos5ev.w2( iqn3 the shore, does it move in a river that is flowing at 1.0 m/s if the boat is heading straight aono.g iiw2* 4*yz3eq5qjv(sv cross the river?

A. 3.0 m/s
B. 4.1 m/s
C. 4.8 m/s
D. 5.0 m/s


参考答案:  B


本题详细解析: 暂无