An object is launched horizontally at a velocity of 19 m/s from the top of a building. It falls vertically a distance of 24m before it reaches the ground. How long does this projectile travel before reaching the ground?

2.2 s

Explanation:

His vertical initial velocity  u =0

vertical displacement h = 24 m .

vertical acceleration g = 9.8 m /s²

h = ut + 1/2 gt²

24 = 1/2 x 9.8 x t²

t = 2.2 s .

Time of fall = 2.2 s

Each day, my teacher walks the two miles from school to her home
while carrying one fitness log under each arm.  This gives her a great
workout that combines aerobic and strength exercise, and contributes
greatly to her overall fitness. 

Once home, my teacher stacks the fitness logs neatly in her fireplace,
and enjoys a sense of toasty comfort and relaxation until her bedtime.