An archer shoots an arrow with an initial velocity of 21 m/s straight up from his bow. He quickly reloads and shoots another arrow the same way 3 s later. At what time and height do the arrows meet?
The first arrow and the second meet at a height y.
The first arrow and the second meet at a height
The first one takes a time
We use the relationship of kinematics:
So we have:
(I rounded a little bit....)