A** The radius of the Moon's orbit about the Earth is m
PHYSICS · Multi-part · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
1. a** The radius of the Moon's orbit about the Earth is 3.8×108 m. Its orbital period is 27.3 days. Show that the mass of the Earth is about 6×1024 kg.
(1) a** The radius of the Moon's orbit about the Earth is 3.8×108 m. Its orbital period is 27.3 days. Show that the mass of the Earth is about 6×1024 kg.
(2) b** The gravitational field strength at the surface of Mars is 0.38 of that of the Earth. The radius of Mars is 3400 km. Calculate the mass of Mars.