How High Did the Object Fall If It Took 1.5 Seconds to Drop the Last 30 Meters?

AI Thread Summary
To determine the height from which a freely falling object dropped, given it takes 1.5 seconds to fall the last 30 meters, the appropriate kinematic equations need to be applied. The solution indicates that the total height is 38.2 meters. Participants in the discussion suggest using equations that relate distance, velocity, time, and acceleration to solve the problem. The focus is on identifying the correct formula to calculate the initial height based on the time and distance provided. Understanding these kinematic principles is crucial for solving similar physics problems effectively.
jaypea65
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Homework Statement



A certain freely falling object requires 1.50 sec to travel the last 30 m before it hits the ground. From what height above the ground did it fall?

Homework Equations





The Attempt at a Solution


the answer is 38.2, but I cannot figure out what formula to use to get there.
 
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jaypea65 said:

Homework Statement



A certain freely falling object requires 1.50 sec to travel the last 30 m before it hits the ground. From what height above the ground did it fall?

Homework Equations



The Attempt at a Solution


the answer is 38.2, but I cannot figure out what formula to use to get there.

Welcome to PF.

Here are some equations for relating x, v, t, a.

https://www.physicsforums.com/showpost.php?p=905663&postcount=2

Maybe you can get an idea.
 
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