Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET
Exam
NEET
Subject
Physics
Chapter
Gravitation

NEET · Physics · Gravitation

Given below are two statements: Statement I: If E be the total...

Given below are two statements:

Statement I: IfEEbe the total energy of a satellite moving around the earth, then its potential energy will be E2\dfrac{E}{2}.

Statement II: The kinetic energy of a satellite revolving in an orbit is equal to the half the magnitude of total energy EE.

In the light of the above statements, choose the most appropriate answer from the options given below.

Options

  1. AStatement I is correct but Statement II is incorrect
  2. BStatement I is incorrect but Statement II is correct
  3. CBoth Statement I and Statement II are correct
  4. DBoth Statement I and Statement II are incorrect

Correct answer

D. Both Statement I and Statement II are incorrect

Step-by-step solution

Let mm be the mass of the satellite.

The potential energy of the satellite is 

U=−GMmrU = \dfrac{- GMm}{r}

The velocity of the satellite is given by 

v=GMrv = \sqrt{\dfrac{GM}{r}}

Kinetic energy is given by

K=mv22=m2GMr=GMm2rK = \dfrac{m{v}^{2}}{2} = \dfrac{m}{2}\dfrac{GM}{r} = \dfrac{GMm}{2r}

The total mechanical energy is the sum of potential and kinetic energy. So,

T=K+U=GMm2r−GMmr=−GMm2rT = K + U = \dfrac{GMm}{2r} - \dfrac{GMm}{r} = - \dfrac{GMm}{2r}

Hence, both the statements are false.

Practice Gravitation on Quantrex Academy →

More from Gravitation

The amount of work done to raise a mass ' m ' from the surface of the Earth to a height… NEET 2026Two planets P_1 and P_2 with equal mass have radii R_1 and R_2 , respectively, where… NEET 2026In a solar system, the time-period of revolution of a planet tracing a circular orbit of… NEET 2026The radius of Martian orbit around the Sun is about 4 times the radius of the orbit of… NEET 2025A body weighs 48 N on the surface of the earth. The gravitational force experienced by… NEET 2025The escape velocity for earth is v . A planet having 9 times mass that of earth and… NEET 2024The mass of a planet is (1)/(10) th that of the earth and its diameter is half that of… NEET 2024An object of mass 100 kg falls from point A to B as shown in figure. The change in its… NEET 2024 Full Gravitation list All NEET PYQs