What unit is used for the value of G in Newton's Law of Universal
Gravitation?
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In SI units, its value is approximately 6.674×10−11 m3⋅kg−1⋅s−2. The modern notation of Newton's law involving G was introduced in the 1890s by C. V. Boys. The first implicit measurement with an accuracy within about 1% is attributed to Henry Cavendish in a 1798 experiment.

Explanation:

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pe = weightxheight = 2000x1000=2,000,000joules

force tends to be low and long diustance masses are high