22-02-2018
Mathematics

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If an object is dropped from a height of 55 feet, d=-16t2+65 gives the height of the object after t seconds

If an object is dropped from a height of 55 feet d16t265 gives the height of the object after t seconds class=

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jimthompson5910 jimthompson5910

22-02-2018

Plug in d = 0 and solve for t
d = -16t^2 + 55
0 = -16t^2 + 55
-55 = -16t^2
t^2 = -55/(-16)
t^2 = 55/16
t = sqrt(55/16)
t = 1.854

It takes approximately 1.854 seconds for the object to hit the ground

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