Gravity ..dbts

Q1 Keplers laws dont always hold true for sattelite motion .Why ?
a)Interactions between planets and the sun are diff fro mthose b/w the planets and the satellites
b)His laws were for elliptical orbits and satellite motion may not always be elliptiical depending on type of projection
c)His laws have certain assumptions that cant be made i ncase of satellites
d)all are correct

Q2 In case of satellite motion(elliptical orbit) which is true
a)T is directly proptional to R²
b)T² is directly proptional to V³
c)T depends on both R and V
d)T T is directly proptional to R

Q3 Earth revolves around sun i na n elliptical orbit of axis 2A and 2B(major and minor) and when it is at distance r form sun,it sweeps a smal area A in a small time interval t.THne find duration of day(approx)