Question

What is the average speed of a satellite given the following information.

1) The earth's radius = 6000 km

2) The satellite is 900 km from the earth's surface

3) The satellite's orbital period: 2 hours

4) Circumference = 2pr (p = 3.14)

A)

6 km/s

B)

10 km/s

C)

5 km/s

D)

8 km/s

Answer 1

r earth = 6,000 km
d satellite from earth = 900.
r satellite's orbit = 6900 km

2*pi*r = circumference = distance traveled around earth.

distance/2 = speed satellite in km/hr

d/hr x (1 hr/60 m) x (1 min/60 s) = ? km/s