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1. The problem statement, all variables and given/known data

An elevator accelerates from the ground with a uniform acceleration 'a.' After 4.0 seconda, an object is dropped out an opening in the floor of the elevator and that object hits the ground 4.5 seconds later.

a) what is the value of the acceleration 'a?'

b) How high was the elevator when the object was dropped?

c) What is the speed of the object when it hits the ground?

2. Relevant equations

V=Vo+at

X=Xo+Vot+1/2(a)(t^2 )

V^2=Vo^2+2a(x-Xo)

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# Homework Help: Please help fast

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