1. Two balls, projected at different times so they don't collide, have trajectories A and B, as shown below. Which statement is correct?

(A) VOB must be greater than voA.
(B) Ball A is in the air for a longer time than ball B.
(C) Ball B is in the air for a longer time than ball A.
(D) Ball B has a greater acceleration than ball A.
(E) Ball A has a greater acceleration than ball B.

答案:登入後查看
統計: A(0), B(3), C(18), D(0), E(0) #3081241

詳解 (共 1 筆)

#5765463

t= √(2gh)
可以看做跟最高高度有關 跟角度與初速等無關

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