First slide

Gravitaional potential energy

Question

A satellite with kinetic energy E is revolving round the earth in a circular orbit. The minimum additional kinetic energy required for it to eecape into outer space is

Moderate

A

$\sqrt{2} E$
B

2 E
C

$E / \sqrt{2}$
D

E

Solution

Initial kinetic energy =E
So initial total energy = - E
If additional kinetic energy is K' , total energy will be (- E +K' ). Therefore ( - E + K') =0 $\Rightarrow K' = E$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App