Question

The mass of the earth is 6 x 1024 kg and that of the moon is 7.4 x 1022 kg. If the distance
between the earth and the moon be 3.84 x 105 km, calculate the force exerted by the
earth on the moon. (G = 6.7 x 10-11 Nm² kg ?)​

Answer 1

Answer:

Given that,

Mass of the Earth m1=6×1024Kg

Mass of the Moon m2=7.4×1022kg

Distance between the Earth and the Moon d=3.84×105km=3.84×108m

 Gravitational Constant G=6.7×10−11Nm2/kg2

Now, by using Newton’s law of gravitation

  F=r2Gm1m2

 F=(3.84×108)26.7×10−11×6×1024×7.4×1022

 F=14.8225×1016297.48×1035

 F=20.069×1019

 F=20.1×1019N

Hence, the gravitational force of attraction is 20.1×1019N