A Projectile Is Shot Straight Up from the Surface of Earth

A projectile is shot straight up from the surface of Earth by means of a very powerful cannon and experiences no appreciable air resistance.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? (G = 6.67 × 10^-11 N ∙ m²/kg²,the radius of Earth is 6.38 × 10⁶ m,and M_earth = 5.97 ∙ 10²⁴ kg)

A) 355 m/s
B) 505 m/s
C) 827 m/s
D) 710 m/s
E) 906 m/s

Correct Answer:

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