Please help me on this quetion, I promise to give a life saverrating (10)/.. 17.

Question

Please help me on this quetion, I promise to give a life saverrating (10)/.. 17. Neglecting air resistance, a 1.0-kg projectile has anesacpe velocity of about 11 km/s at the surface of Earth. Thecorressponding esacpe velocity for a 2.0 kg projectile is : A) 3.5 km/s B) 5.5km/s C) 7.1km/s D) 10km/s E) 11 km/s Please help me on this quetion, I promise to give a life saverrating (10)/.. 17. Neglecting air resistance, a 1.0-kg projectile has anesacpe velocity of about 11 km/s at the surface of Earth. Thecorressponding esacpe velocity for a 2.0 kg projectile is : A) 3.5 km/s B) 5.5km/s C) 7.1km/s D) 10km/s E) 11 km/s

Explanation / Answer

let v = escape speed, then mv2/2 + (-GmM/r) = 0 where M and r are mass and radius of earth, respectively. v = (2GM/r) = 11 km/s so v is independent of the mass of the object m, answer is still 11 km/s

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