Question
A brick is released with no initial speed from the roof of a building and strikes the ground in 1.50 {s}, encountering no appreciable air drag.
A. How tall, in meters, is the building?
B.How fast is the brick moving just before it reaches the ground?
A. How tall, in meters, is the building?
B.How fast is the brick moving just before it reaches the ground?
Answers
a. h = 0.5gt^2
h = 0.5 * 9.8 * (1.5)^2 = 11m.
b. V = gt = 9.8 * 1.5 = 14.7m/s.
h = 0.5 * 9.8 * (1.5)^2 = 11m.
b. V = gt = 9.8 * 1.5 = 14.7m/s.
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