SATHEE: Gravitation Question 128

Gravitation Question 128

Question: The gravitational potential energy of a body of mass ?m? at the earth’s surface $[- m g R_{e}]$ . Its gravitational potential energy at a height $[R_{e}]$ from the earth’s surface will be (Here $[R_{e}]$ is the radius of the earth) [AIIMS 2000; MP PET 2000; Pb. PMT 2004]

Options:

A) $[- 2, m g R_{e}]$

B) $[2, m g R_{e}]$

C) $[\frac{1}{2} m g R_{e}]$

D) $[- \frac{1}{2} m g R_{e}]$

Show Answer

Answer:

Correct Answer: D

Solution:

$[Δ U = U_{2} - U_{1} = \frac{m g h}{1 + \frac{h}{R_{e}}} = \frac{m g R_{e}}{1 + \frac{R_{e}}{R_{e}}} = \frac{m g R_{e}}{2}]$ $[, \Rightarrow, U_{2} - (- m g R_{e}) = \frac{m g R_{e}}{2}]$ Þ $[U_{2} = - \frac{1}{2} m g R_{e}]$

Gravitation Question 128

Question: The gravitational potential energy of a body of mass ?m? at the earth’s surface $[- m g R_{e}]$ . Its gravitational potential energy at a height $[R_{e}]$ from the earth’s surface will be (Here $[R_{e}]$ is the radius of the earth) [AIIMS 2000; MP PET 2000; Pb. PMT 2004]

Options:

Answer:

Solution:

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NCERT Books & Solutions

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Gravitation Question 128

Question: The gravitational potential energy of a body of mass ?m? at the earth’s surface [−mgRe] . Its gravitational potential energy at a height [Re] from the earth’s surface will be (Here [Re] is the radius of the earth) [AIIMS 2000; MP PET 2000; Pb. PMT 2004]

Options:

Answer:

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

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Question: The gravitational potential energy of a body of mass ?m? at the earth’s surface $[- m g R_{e}]$ . Its gravitational potential energy at a height $[R_{e}]$ from the earth’s surface will be (Here $[R_{e}]$ is the radius of the earth) [AIIMS 2000; MP PET 2000; Pb. PMT 2004]