The gravitational force of attraction between two masses is inversely proportional to the square of the distance between them. Suppose that when a comet is 600 x 103 kms from the earth and receding at 12000 km/sec, the force between the comet and the earth is 3 kN. How fast is the force changing in kN/sec at that instant?a) -0.24b) -0.18c) -0.16d) -0.12

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University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter11: Particle Physics And Cosmology

Section: Chapter Questions

Problem 69P: Show that the velocity of a star orbiting its galaxy in a circular oibit is inversely proportional...

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The gravitational force of attraction between two masses is inversely proportional to the square of the distance between them. Suppose that when a comet is 600 x 10³ kms from the earth and receding at 12000 km/sec, the force between the comet and the earth is 3 kN. How fast is the force changing in kN/sec at that instant?

a) -0.24

b) -0.18

c) -0.16

d) -0.12

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