Câu hỏi:
A woman is walking down a street night at a constant pace.  As she passes the street light, she notices that her shadow becomes longer.  Does the top of her shadow move faster, slower or the same when the shadow is longer as when it is shorter?
Đáp án:
This point maintains a constant speed, independent of the lenght of the shadow.
0
0
Chia sẻ với bạn bè