How long until the mailbag reaches the ground?

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SUMMARY

The height of a helicopter is modeled by the equation h = 3.00t³, where h is in meters and t is in seconds. After 1.80 seconds, the helicopter releases a mailbag, and the task is to determine how long it takes for the mailbag to reach the ground. To solve this, one must first calculate the initial velocity of the mailbag at the moment of release, which is derived from the height equation. The correct approach involves applying kinematic equations rather than the initial equations attempted by the user.

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Homework Statement


The height of a helicopter above the ground is given by h = 3.00t3 , where h is in meters and t is in seconds. After 1.80 s, the helicopter releases a small mailbag. How long after its release does the mailbag reach the ground?


Homework Equations



a = delta v/ delta t= delta d/ delta t^2

The Attempt at a Solution


i keep getting 2.2 seconds which is wrong
 
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I think you have to find the velocity of the helicopter going up which will end up giving you the initial velocity of the mailbag. Also I think your equation you're using is incorrect, try the kinematics equations.
 

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