Time remaining:
Suppose an object is dropped from a height h0 above the ground. Then its height

Algebra
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A ball is dropped from the top of a building 82 ft tall. (Round your answers to three decimal places.)

(a) How long will it take to fall half the distance to ground level?
(b) How long will it take to fall to ground level?
Jan 26th, 2015

displacement = 1/2 acceleration x time^2,

d = 1/2 g t^2,

t = square root { 2 d / g }.

g = 32.2 ft/s^2.


(a)  d = 82 / 2 = 41ft

= sqrt { (2)(41)/(32.2) }s

Answer: 1.596 seconds



(b)  d = 82ft

= sqrt { (2)(41)/(32.2) }s

Answer: 2.257 seconds








 

Jan 26th, 2015

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