SAMPLE PROBLEM 4 5 The Moon revolves about the Earth making

Last updated: 6/19/2023

SAMPLE PROBLEM 4 5 The Moon revolves about the Earth making a complete revolution in 27 3 days Assume that the orbit is circular and has a radius r 238 000 miles What is the magnitude of the gravitational force exerted on the Moon by the Earth Solution We have r 238 000 mi 3 82 x 10 m From Ap pendix C we find the mass of the Moon is m 7 36 x 1022 kg The time for one complete revolution called the period is T 27 3 d 2 36 106 s The speed of the Moon assumed constant is therefore V FME 2 r T The centripetal force is provided by the gravitational force on the Moon by the Earth Result my Speed of the moon Centripetal force I 1 m s N