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(IF DONE CORRECTLY I WILL GIVE EXTRA 20 POINTS)

Identify all your data, write the equation, and show your work.

King Kong carries Fay Wray up the 321-meter high Empire State Building. At the top of the skyscraper, Fay Wray’s shoe falls from her foot.

Neglecting air resistance, how long does it take for the shoe to reach the ground?

Respuesta :

cdw2014
Data:
Height = 321 m
Vi = 0 m/s
Acceleration = -9.8 m/s^2
t = ?

Now choose a kinematic equation with all of these variables.

y - yi= Vi*t + 0.5at^2

0 - 321 = 0 + 0.5 * 9.8 * t^2

-321/(0.5*-9.8) = t^2

t = sqrt(321/4.9) = 8.094 s



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