21) The force on a Ikg mass on the earth's surface is 10N. If the radius of the earth is 6400km, the force on a 4kg mass at a point 2000km from the center of the earth, (assuming the earth has uniform density) is:

21) The force on a Ikg mass on the earth's surface is 10N. If the radius of the earth is 6400km, the force on a 4kg mass at a point 2000km from the center of the earth, (assuming the earth has uniform density) is:

Classical Dynamics of Particles and Systems

5th Edition

ISBN:9780534408961

Author:Stephen T. Thornton, Jerry B. Marion

Publisher:Stephen T. Thornton, Jerry B. Marion

Chapter5: Gravitation

Section: Chapter Questions

Problem 5.6P: Compute directly the gravitational force on a unit mass at a point exterior to a homogeneous sphere...

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21) The force on a Ikg mass on the earth's surface is 10N. If the radius of the earth is 6400km, the force
on a 4kg mass at a point 2000km from the center of the earth, (assuming the earth has uniform
density) is:
A) 3.125
(B) 40N
(C) 12.5N
(D) 12.8N

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