Question

The Earth orbits the Sun once per year.What is the centripetal force keeping the Earth in orbit?

T = 1 year (convert to seconds)
r = 1.5e+11 meters
m = 6e+24 kg

Answer 1

Centripetal force = M*V^2/r

For V, use 2*pi*r/T
T = 3.154*10^7 s

Turn the crank