Answers: 1
, assuming that this object started from rest, 
, and that air resistance on this object is negligible.
, the gravitational field strength (
near the surface of the earth.) 
and 
denote the final and initial velocity of this object, respectively. Under the assumption that this object started from rest, 
.Let 
denote the acceleration of this object. Under the assumptions above, 
.Let 
denote the displacement of this object. In this question, 
.
.
.
.
, 
, and 
.
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