Question

What should be the firing angle for a body to escape from the earth?

• A. ${45}^{\circ }$
• B. $0^{\circ }$
• C. ${90}^{\circ }$
• D. Any angle

Answer 1

The correct option is D Any angle

For a body to escape from the earth, the particle has to be fired with escape velocity, which is independent of angle of projection.
Escape velocity is given as: ${\text{v}}_{\text{e}}=\sqrt{\frac{\text{2GM}}{\text{R}}}$