PHYS171_f11_lecture_23

PHYS171_f11_lecture_23 - PHYS171 Principles of Physics I...

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PHYS171 Principles of Physics I Chapter 6 Kepler’s Laws • All planets move in elliptical orbits with the sun at one focus • The radius vector drawn from the sun to a planet sweeps out equal area in equal time • The square of the orbital period of any planet is proportional to the cube of the semi-major axis of the elliptical orbit Components of scientific method here, a compact set of rules defined which describe complicated phenomena. What is missing is the unifying mathematical principle
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Chapter 6 Newton’s Insight Sir Isaac Newton postulated that the same laws that governed motion of object on earth govern the motion of celestial bodies. The Three Laws of motion apply to celestial objects and earthly objects •An object in motion remains in motion unless acted upon by an outside force •Acceleration is proportional to force divided by mass •If one object exerts a force on a second object, the second object exerts an equal and opposite force on the first object.
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This note was uploaded on 12/29/2011 for the course PHYSICS 171 taught by Professor La porta during the Fall '11 term at Maryland.

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PHYS171_f11_lecture_23 - PHYS171 Principles of Physics I...

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