if i want to creat artificial  gravity=9.8m/s sq of an artificial satallite of radius 400m then find what rotation per minute should it have .

crack this one............................... 

cant you try this one

hi friend its simple

you have to write this equation

mW²r-GMm/r²=9.8m

W²r-GM/r²=9.8

W²r-9.8(R²/r²)=9.8

W²r=9.8(1+(R/r}²)

since R/r>>>>>>1 hence neglecting 1

you will eazily get the and

plz rate me i am new