Author Question: An object is thrown vertically and has an upward velocity of 18 m/s when it reaches one fourth of ... (Read 142 times)

joe · **on:** Jul 28, 2018

An object is thrown vertically and has an upward velocity of 18 m/s when it reaches one fourth of its maximum height above its launch point. What is the initial (launch) speed of the object?
a. 35 m/s
b. 25 m/s
c. 30 m/s
d. 21 m/s
e. 17 m/s

Question 2

A ball is thrown vertically upward with an initial speed of 20 m/s. Two seconds later, a stone is thrown vertically (from the same initial height as the ball) with an initial speed of 24 m/s. At what height above the release point will the ball and stone pass each other?
a. 17 m
b. 21 m
c. 18 m
d. 27 m
e. 31 m