This type of thinking is the right type of thinking.
Energy, it is all around us as it transfers from one form to another. However, our world has faced, faces, and will continue to face an ‘energy crisis’. Be it having to depend on foreign energy sources or pouring CO2 into the atmosphere from fossil fuel consumption, we humans have made energy and its impacts on Earth a serious issue. This issue could use more thinking and action like we’re seeing in this tidal lagoon energy project in the UK.
The Moon and Earth interact in a gravitational tug-of-war. Though the Moon is ‘owned’ by Earth (mass of Earth >> mass of Moon), the Moon still induces the same force of gravity on Earth as the Earth induces on the Moon. Trust me, the math works. F1 = F2. Thank you, Newton!
Image courtesy of: “Newton’s Law of Universal Gravitation.” Wikipedia. Wikimedia Foundation, 27 Feb. 2015. Web. 01 Mar. 2015. (Visit link above and watch Professor Lewin’s Lecture video from MIT lecture hall)
As the Earth’s high mass results in a higher inertia (more resistance to move), it is the more fluid, less dense, lower inertia substance, our oceans, that are more readily affected by the Mooon’s gravity. The transfer is gravitational to kinetic (motion of the oceans).
Just how have the UK (and various other countries) tapped into this gravitational –> kinetic energy transfer? Watch and find out: