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 Physics Question

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 motor-cyclist drives a motor cycle in a vertical circle. His minimum velocity
  2. Two charges each equal to 2µ C are 0.5m apart. If both of them exist inside vacuum
  3. In a transistor, the value of βis 100, then the value of α will be
  4. A thin wire of resistance 4 ohm is bent to form a circle. The resistance across
  5. The number of possible natural oscilations of air column in a pipe closed

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.

NEETLab Mobile App

Share this page with your friends

Be the first to comment

Leave a Reply

Your email address will not be published.


*