Find its velocity just before impact with the ground

Reference no: EM13490026

The height of a helicopter is given by h=150+5(t)^2. Where h is in meters and s is in seconds. After 5s the helicopter releases a small mailbag.

a) how long after its release does the mailbag reach the ground?

b) what is its velocity just before impact with the ground.

Reference no: EM13490026

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