Problem 1-20| General Principles| Engineering Mechanics: Statics| RC Hibbeler

Two particles have a mass of 8 kg and 12 kg, respectively. If they are 800 mm apart, determine the force of gravity acting between them. Compare this result with the weight of each particle.


The force of gravity acting between them:

F=G\cdot \frac{m_1m_2}{r^2}=66.73\left(10^{-12}\right)\left[\frac{8\left(12\right)}{0.8^2}\right]=10\left(10^{-9}\right)N=10.0nN

Weight of the 8 kg particle


Weight of the 12 kg particle