1.An arrow is shot vertically upward and then 1.81 s later passes the top of a tree 40.4 m high. How much longer will the arrow travel upward, and how high will it go?
time ______
height ______
2. A runner travels 100 m in 10.2 s. Assume that it takes him 1.44 s to reach his top speed, which is then maintained for the rest of the race. Find the following values:
(a) average speed
(b) acceleration during the first 1.44 s
(c) maximum speed