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**1. Homework Statement**

A projectile is shot from the surface of te Earth by means of a very powerful cannon. If the projectile reaches a height of 35,000 m above Earth's surface, what was the speed of the projectile when it left the cannon?

a. 355 m/s

b. 827 m/s

c. 710 m/s

d. 906 m/s

**2. Homework Equations**

v= square root of GM/r

**3. The Attempt at a Solution**

theres no mass, so i wasnt sure how to solve it exactly