最初
According to this passage, which of the following statements is TRUE?
According to this passage, which of the following statements is TRUE?
一滑块以某初速度从光滑斜面底端滑到顶端时,速度恰好为零,已知斜面长L,滑块通过最初时所用时间为t,则滑块从斜面底端滑到顶端所用的时间为____.
一滑块以某初速度从光滑斜面底端滑到顶端时,速度恰好为零,已知斜面长L,滑块通过最初时所用时间为t,则滑块从斜面底端滑到顶端所用的时间为\_\_\_\_.