Ageostationary satellite has a orbital radius of 4.23*10.7m. a).calculate it’s speed in orbit

Answer ;

Note : Satellite completes  one orbit in the same time the earth rotates one about its axis

circumference of the orbit = 2 ×π × 4.23×10⁷  (similar to the earth orbital speed

The time of earth/orbit traveled  = 23.93 hrs ,

Speed of the orbit = (distance) ÷ (time)

                              = circumference ÷ time

                              = (2 ×π × 4.23×10⁷) ÷ 23.93   (1 hr = 3600 sec.)

                              = 3085.14 m/s

The orbital velocity is 3085.14 m/s

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.