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The Horse Before the Cart

The Horse Before the Cart. A Physics Phable By Leo Takahashi, The Pennsylvania State University, Beaver Campus. Newton’s 3 rd Law says: If I exert a force on the cart, the cart exerts an equal and opposite force on me!. Once upon a time there was a horse. His owner hitched him to a cart.

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The Horse Before the Cart

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  1. The Horse Before the Cart A Physics Phable By Leo Takahashi, The Pennsylvania State University, Beaver Campus

  2. Newton’s 3rd Law says: If I exert a force on the cart, the cart exerts an equal and opposite force on me! Once upon a time there was a horse. His owner hitched him to a cart. Then Things got interesting: Read your physics Textbook! Those forces add up to zero, so I can’t move the cart. No point in my pulling on your cart. No Way! Says who? What? Why not? Nope; I can’t do that. Isaac Newton, that’s who. Giddeappe! Let’s Go!

  3. Equal-Opposite; F = 0; a = 0; no motion HELP!!!!!!! OH NOOOOOO!!! Wait a minute; I did read that. There are three laws, and the fist one does say “net force of zero means a body at rest stays at rest, and the third law talks about equal and opposite forces, so that means….. 2nd Law 3rd Law Horse Cart

  4. Physics Guru A HORSE IS NOT A CART! Look at them separately!!

  5. Force on Cart by the Horse, F Force on Horse by the Cart, F Equal and Opposite Backward force Fgof ground on cart Response to the Horse’s effort: A Forward force FG of ground on horse

  6. AHA! If FG> F and F> Fg The NET Force on Each is Forward!! Horse and Cart accelerate forward together!!!!! GIDDEAPPE!!!!! IIt takes more than horse sense to grok Newton’s Laws F F FG Fg

  7. The End

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