Question

Two satellites have circular orbits with the same radius. One satellite is twice mass of the other. Which has a higher speed?

Answer 1

Answer:

The satellite which has greater mass will have greater orbital speed

As the satellite 1 has greater mass so it has higher speed

Explanation:

We have given satellites have same radius

Let R is the radius of both satellites

Let $M_1\ and\ M_2$ are the mass of both satellite

Orbital speed is given by $orbital\ speed=\sqrt{\frac{GM}{R}}$

In question it is given $M_1=2M_2$

From the relation we can see that orbital speed is directly proportional to the mass

So the satellite which has greater mass will have greater orbital speed

As the satellite 1 has greater mass so it has higher speed