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Chronos
on June 1, 2017
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LIGO Detects Gravitational Waves for Third Time
It's squared because energy is work, work is force times displacement (distance), force is mass times acceleration, acceleration is velocity per time, and velocity is vector distance per time. So you get:
mass × distance × ((distance ÷ time) ÷ time)
mass × distance^2 ÷ time^2
mass × (distance ÷ time)^2
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mass × distance × ((distance ÷ time) ÷ time)
mass × distance^2 ÷ time^2
mass × (distance ÷ time)^2