Author Question: An 825-kg space vehicle is circling Earth in a circular orbit with a radius of 10,300 km. Its orbit ... (Read 121 times)

LaDunn · **on:** Jul 29, 2018

An 825-kg space vehicle is circling Earth in a circular orbit with a radius of 10,300 km. Its orbit is to be changed to a larger circle with a radius of 17,400 km. How much energy is required to accomplish this?

The mass of Earth is 5.97 1024 kg and G = 6.67 10-11 N m2/kg2.
A) 1.00 109 J
B) 1.30 1010 J
C) 6.51 109 J
D) 4.45 109 J
E) 4.50 1010 J

Question 2

Two uniform solid spheres have the same mass, but one has twice the radius of the other. The ratio of the larger sphere's moment of inertia about a central axis to that of the smaller sphere is

A) 4/5.
B) 8/5.
C) 1/2.
D) 2.
E) 4.