# Homework Help: Curvature of the Earth

1. Sep 18, 2011

### Vash2940

Hello, I am in a General Physics class and I am having trouble understanding this question. There aren't any similar examples in my book either. I am not looking for the solution, just a step in the direction.

I don't really know where to start or how to begin the proof process.

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

The curvature of the earth becomes important in projectile calculations when the distance traveled R, is a significant fraction of the radius of the earth, Re. Ignoring any possible variations in g, show that (a) the extra time the projectile is in motion is approximately given by (delta)t = delta(y)/V0y(initial y velocity) = R^2/2Re/V0y; (b) the fractional error (delta)R/R is given by (delta)R/R = V0x^2/gRe.

2. Relevant equations

Look at the end of the question.

3. The attempt at a solution

I am new here, so forgive me if this format isn't correct, Ill be sure to fix it right away

Thanks!