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afcwestwarrior
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Homework Statement
An astronaut on a distant planet wants to determine it's acceleration due to gravity. The Astronaut throws a rock straight up with a velocity of +15 m/s and measures a time of 20.0 s before the rock returns to his hand. What is the acceleration due to gravity on this planet.Velocity=15 m/s
Time= 20.0s
Homework Equations
v=Vo + at
x=Vot + 1/2 a t^2
v^2= Vo^2 + 2ax
The Attempt at a Solution
I have no clue where to start. Give me a hint please.