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## Homework Statement

A projectile launched vertically from the surface of the Moon rises to an altitude of 370 km. What was the projectile's initial speed?

## Homework Equations

h = 370,000 m

g moon = 1.62 m/s^2

G = 6.67x10^-11 N m^2/kg^2

Mass moon = 7.35x10^22 kg

Radius moon = 1.74X10^6 m

vf^2 = vi^2 - 2gh

## The Attempt at a Solution

I calculated g on the moon to be 1.62 m/s^2. I then used kinematics (vf^2 = vi^2 - 2gh) and I get:

vf = 0

vi = ?

g = 1.62 m/s^2

vf^2 = Vi^2 - 2gh

solving for Vi = sqroot of Vf^2 + 2gh

I get initial velocity to be 1095.57 m/s. The answer is not correct, and I really don't understand what I'm doing wrong.