Lecture5 Newton Complete

# Lecture5 Newton Complete - The Big Picture Interplay...

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The Big Picture Interplay between matter and energy over all scales! Luckily, just a few physical laws govern the movements of everything, from atoms to galaxies. Our understanding started with Copernican Revolution, Galileo & Kepler ... but it was Newton who put all the pieces together . .

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Sir Isaac Newton (1642-1727) Generally regarded as the greatest scientist ever Studied light, gravity, motion Newtonian physics dominated the world of physics until Einstein Invented calculus to solve a different problem Had a somewhat bizzare life not that long ago!
True Genius Starting with careful experiments, Newton deduced three remarkably simple Laws of Motion for ordinary objects on Earth. Realized physical laws that work on Earth are Universal. Newton’s Law of Universal Gravitation explains the motions of the planets. Isaac Newton (1642-1727)

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Speed, Velocity and Acceleration How do we describe motion? (a)
A. the same speed and velocity. B. the same speed but different velocities. C. different speeds but the same velocity. D. different speeds and velocities. Survey Question 40 mph west 40 mph east These two cars have:

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Speed vs Velocity Speed and velocity are not the same thing: Speed = distance / time - 60 mph Velocity = speed + direction - 60 mph heading north
A. the same speed and velocity. B. the same speed but different velocities. C. different speeds but the same velocity. D. different speeds and velocities. Survey Question 40 mph west 40 mph east These two cars have:

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I am driving 75mph. This statement best describes a(an) A. speed B. velocity C. acceleration Question
I am driving 75mph. This statement best describes a(an) A. speed B. velocity C. acceleration Question

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She is climbing up a cliff at 10 feet per minute. This statement best describes a(an) A. speed B. velocity C. acceleration Question
She is climbing up a cliff at 10 feet per minute. This statement best describes a(an) A. speed B. velocity C. acceleration Question

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I came to a screeching halt when I saw the dog in the road. This statement best describes a(an) A. speed B. velocity C. acceleration Question
I came to a screeching halt when I saw the dog in the road. This statement best describes a(an) A. speed B. velocity C. acceleration Question

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What produces acceleration in a car? A. The accelerator. B. The brake. C. The steering wheel. D. All of the above. Question
What produces acceleration in a car? A. The accelerator. B. The brake. C. The steering wheel. D. All of the above. Question Acceleration : how fast an object’s velocity changes (velocity ÷ time) Acceleration is any CHANGE CHANGE in velocity!

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A moon orbits a planet at a constant speed in a circular orbit. This statement best describes a(an) A. speed B. velocity C. acceleration Question
A moon orbits a planet at a constant speed in a circular orbit. This statement best describes a(an) A. speed B. velocity C. acceleration Question

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Force = any push or pull on an object that CHANGES CHANGES its motion!
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