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Answer in Physics for Kate Swales #226687

Author:
January 24th, 2023

The mass of Earth is 6.0 * 10^24kg. The mass of the moon is 7.4 * 10^22kg. The distance between the Earth and the moon is 3.8 * 10^8m.

(a) Treating the bodies as point masses, calculate the gravitational field strength at a distance of 3.42 × 10^8 m from the Earth, on the line that joins them.

b) Comment on this result; what is the net field strength at that point? (1 mark)

The field from the earth:

“g_e=frac{GM_e}{r^2}=0.00342text{ N/m},\space\ng_m=frac{GM_m}{(R-r)^2}=0.00342text{ N/m}.”

The gravitational field strength is 0 if we consider 3 significant figures and it’s 0.00004 of we consider more.

Add we see, the gravitational influence of the earth is infinitesimal.

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