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International Edition---engineerin...

4th Edition
Andrew Pytel And Jaan Kiusalaas
Publisher: CENGAGE L
ISBN: 9781305501607
Chapter 1, Problem 1.15P
Textbook Problem
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Two 12-kg spheres are placed 400 mm apart. Express the gravitational attraction acting between the spheres as a percentage of their weights on earth.

To determine

The gravitational attraction acting between the spheres as a percentage of their weights on earth.

Explanation of Solution

The spheres are of 12 kg and are placed 400 mm apart.

Calculation:

The mass of spheres,

  m1=m2=12 kg.

The distance between the spheres,

  r=400 mm=400×103 m =0.4 m

So, the gravitational force between them,

  F=Gm1m2r2=6.67× 10 11×12×12 0.42 =6.003×108 N

The weight of each sphere on earth,

  W=mg=12×9

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Chapter 1 Solutions

International Edition---engineering Mechanics: Statics, 4th Edition
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