Question

A satellite of mass 'm', revolving round the earth of radius 'r' has kinetic energy (E). Its angular momentum is ______.

Options

• (mEr²)

• `(2mEr^2)^(1/2)`

• `(mEr^2)^(1/2)`

• `(2mEr^2)`

Answer 1

A satellite of mass 'm', revolving round the earth of radius 'r' has kinetic energy (E). Its angular momentum is `underline((2mEr^2)^(1/2))`.

Explanation:

`E=1/2mV^2`

`thereforeV=sqrt((2E)/m)`

Angular momentum L = mvr `=m*sqrt((2E)/m)*r`

`=sqrt(2mEr^2)`

`=(2mEr^2)^(1/2)`