Answer:
The answers to the question are
a) 1.632 s
b) 13.05 m
c) 3.265 s
d) 65.31 m.
Explanation:
To solve the question we note that
v = u - g·t
Where u = initial velocity = 16 m/s
v = final velocity = 0 m/s
t = time
Therefore 0 = 16 - 9.8×t or t = 16/9.8 = 1.632 s
b) We have
v² = u² - 2·g·h
Where h = height
Therefore 0 = 16² -2×9.81×h
or h = 16²/19.62 = 13.05 m
c) The time required for the ball to return to its original level is
2 × time to maximum height = 2×1.632 = 3.265 s
d) Distance traveled horizontally is
Horizontal Velocity = 20 m/s
Distance =Horizontal Velocity × Time = 20×3.265 = 65.31 m
