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

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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.