Question

Two satellites are revolving in the same circular orbit around the center of the earth. They must have the same

• A. mass
• B. angular momentum
• C. kinetic energy
• D. magnitude of velocity

Answer 1

The correct option is D magnitude of velocity

For a satellite to revolve in a circular orbit,
its orbital velocity, $v_o=\sqrt{gr}$
where,
$g=$ acceleration due to gravity of the planet
So,
$v_o\propto \sqrt{r}$

Hence velocity can be the same for both satellites.

The satellites can have different masses.
$\Rightarrow$kinetic energy and angular momentum are variable, as they are dependent on mass.

So, the correct answer is option (d).