(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Standing on the surface of a small spherical moon whose radius is 6.00*10^{4}m and whose mass is 7.50*10^{18}kg, an astronaut throws a rock of mass 2.05 kg straight upward with an initial speed 38.5 m/s. (This moon is too small to have an atmosphere.) What maximum height above the surface of the moon will the rock reach?

2. Relevant equations

g=GM/r^{2}

3. The attempt at a solution

I calculated g, then used the kinematic equation Δy = (v_{f}^{2}- v_{i}^{2}) / 2a, but it didn't work! Did I use the wrong equations?

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# Homework Help: Gravitation problem about throwing an object upward

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