The kinetic energy needed to project a body of mass m from the surface of earth

⇦

⇨

The kinetic energy needed to project a body of mass m from the surface of earth (radius R) to infinity is

Options

(a) mgR/2
(b) 2mgR
(c) mgR
(d) mgR/4

Correct Answer:

mgR

Explanation:

The kinetic energy =1/2MVe²
The escape velocity Ve=√2gR
Ve²=2gR
= 2mgR/2
=mgR

Related Questions:

1. A particle moves in xy plane according to the equation x = 4t² + 5t + 16 and y = 5t
2. The energy band gap is maximum in
3. A ray of light passes from a medium A having refractive index 1.6 to the medium
4. Work of 3.0×10⁻⁴ joule is required to be done in increasing the size of a soap film
5. A ship of mass 3 x 10⁷ kg initially at rest is pulled by a force of 5 x 10⁴ N through

Topics: Gravitation (63)
Subject: Physics (2479)

---

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

---

Share this page with your friends