COLLEGE PHYSICS,VOLUME 1
COLLEGE PHYSICS,VOLUME 1
2nd Edition
ISBN: 9781319115104
Author: Freedman
Publisher: MAC HIGHER
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Chapter 10, Problem 66QAP
To determine

The gravitational force exerted by the bowling balls on a ping pong ball

Expert Solution & Answer
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Answer to Problem 66QAP

Total gravitational force =8.023×1012N

Explanation of Solution

Given info:

Mass of a bowling ball = 8.0kg

Radius = 11.0cm

Distance from point P = 1.0m

Mass of ping pong ball = 2.70g

Formula used:

  F=GMmR2

  F= Gravitational force

  G= Gravitational constant

  M= Mass of bowling ball

  R= Radius

  m= Mass of ping pong ball

Calculation:

  1. Radius of each bowling bowl,
  2. Using Pythagorean theorem,

  x1=(1.0m)2+(0.11*2m)2=1.02m

  x2=(1.0m)2+(0.11*4m)2=1.09m

  x3=(1.0m)2+(0.11*6m)2=1.20m

Gravitational force of each bowling bowl,

  F1y=GMmx12=(6.67*1011Nm2/kg2)*8.0kg*(2.70*103kg)(1.00m)2=1.44*1012N

  F2=F5=GMmx12=(6.67*1011Nm2/kg2)*8.0kg*(2.70*103kg)(1.02m)2=1.38*1012N

  F2y=F5y=F2x1=1.38*1012N1.02m=1.35*1012N

  F3=F6=GMmx12=(6.67*1011Nm2/kg2)*8.0kg*(2.70*103kg)(1.09m)2=1.21*1012N

  F3y=F6y=F3x2=1.21*1012N1.09m=1.11*1012N

  F4=F7=GMmx12=(6.67*1011Nm2/kg2)*8.0kg*(2.70*103kg)(1.20m)2=1.00*1012N

  F4y=F7y=F3x3=1.00*1012N1.20m=8.33*1013N

Total gravitational force,

  Fnet=F1y+F2y+F3y+F4y+F5y+F6y+F7y=1.44*1012N+((1.35*1012N1.11*1012N8.33*1013N)*2)Fnet=8.023*1012N

Conclusion:

Total gravitational force =8.023×1012N

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