Question

In the  23^rd century, an Earth probe to the planet Altair IV (mass 1.05x10²⁴ kg, radius 3.68x10⁶ m) has a communications failure. To request assistance, a small projectile is shot toward Earth from the surface of the planet, at speed 17.5x10³ m/s (which is greater than the escape speed). Ignore friction and all other objects in the universe, and assume the projectile has no fuel. Find the speed of the projectile, in m/s,when it reaches Earth, which is far enough from Altair IV so the planet has negligible gravitational pull on the projectile (at r = ∞). Give your answer in scientific notation.

Answer 1