About how much greater is the gravitational force exerted by the moon on the near side of the earth than on the far side? Choose one of the Following: (a) About 2% greater
(b) About 7% greater
(c) About 11% greater
(d) About 15% greater

Solution :

Distance between the Earth and the moon, D =

Radius of the earth, r =

Gravitational force on the near side of the moon,    ......(1)

Gravitational force on the far side of the moon, ..............(2)

where, = mass of moon

            m = mass of the near side and far side respectively (both are taken as equal)

Therefore,

                       = 7%

Hence, correct option is (b) About 7% greater

cancer risk hope this