Calculate the escape velocity for a rocket fired from the earth's surface at a point where the acceleration due to gravity is 10ms-2 and the radius of the earth is 6 x 106m.
A
7.8 x 106ms-12
B
1.1 x 104ms-1
C
3.5 x 107ms-1
D
6.0 x 107 ms-1
E
1.2 x 108ms2-1
Verified Correct Answer: B.
Physical Principles & Numerical Solution
Hint: V = √2gr = √(2x10x6x106) + 1.1 x 104ms-1
Source: Myschool Past Questions Archive (Record #23927)