Question

The moon mass is 7.36*10^22kg,(and its assumed circular) orbit has a radius 3.84 *10^8 and a period 27.3 days. Find the Moon's Kinetic Energy.

Answer 1

First thing i did was to find velocity using this formula
\[v=2piR/T\]
v=88378870.25m/s

then i used the kinetic energy formula
\[KE=(1/2)*m*v^2\]
which gives me different numbers each time.

Answer 2

what do you mean its different every time?

Answer 3

every time i calculate the equation in my calculator, i keep getting different answers.