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katia11
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Homework Statement
45. A freely falling object requires 1.50 s to travel the last 30.0 m before it hits the ground. From what height above the ground did it fall?
Homework Equations
x = xi + Vit + (1/2)at2
Vf2 = Vi2 + 2ad
The Attempt at a Solution
First found the initial velocity from 30.0 m left
30m = 0m + Vi (1.5 sec) + (1/2) (-9.81 m/s2) (1.5 sec)2
Vi= 27.36 m/s at 30 m away from ground
Distance from original height to 30 m left
(27.36 m/s)2 = (0 m/s)2 + 2 (-9.8a m/s2) d
-38.15 m = d
total distance = 68.15 m
I hope this is right! Thank you!