Question

The escape velocity of a body projected vertically upwards from the surface of the earth is 11km/sec. If the body is projected at an angle of 45° with the vertically, the escape velocity will be ___________

(a) 22km/sec

(b) 11km/sec

(c) 11√2km/sec

(d) 11/√2km/sec

The question was asked in an interview for internship.

Question is taken from Orbital Velocity topic in portion Kinetic Theory of Gases of Engineering Physics I

Answer 1

Correct option is (b) 11km/sec

The best I can explain: Escape velocity does not depend on the angle of the projection of the projectile. Hence the escape velocity remains the same as the earlier condition.