Walking?
Entry posted by SwagDragon15
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All the fundamental laws of physics are involved in arguably a human's most simple movement throughout the day. The law of conservation of energy, Newton's three basic laws and even gravity are all involved in simply walking across a room! :eek: The conservation of energy is that TE=PE+KE+W where total energy equals potential energy plus kinetic energy plus work. Our total energy is conserved when walking obviously, which means a variety of things. The potential energy is the biochemical potential of your muscles and frame, which in turn is converted by work into kinetic energy, otherwise known as the walking itself. As far as Newton, many things apply. For example, if you are standing still you need to invoke your TE to create a force to push off with your feet. This shows his first law that an object at rest stays at rest unless acted upon by a force. In addition the first law proves that if you are already moving your body wants to stay in motion and will eventually need a force to slow it down in reality. In addition the movement results from Newton's idea of equal and opposite forces. As you push off your foot takes advantage of the static friction between the cement and your shoe sole that creates an opposite force for your shoe to push against. As that force pushes you forward work is being done.
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