Get rid of ruler across page in final draft 10
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Important idea here is Newton's second law, F=m(Δ v/Δ t) The problem is that the situation is not fully enoughĭescribed�"�as if the truck hit�" is not defined, what does that mean? The
#GET RID OF RULER ACROSS PAGE IN FINAL DRAFT 10 TV#
Who is right? I saw Mythbusters (The Discovery TV show) do test on Will be as if the truck hit a stationary object at 140 MPH, and I saidĪnd argued that it would still be as if it hit a stationery object at 70 They hit each other and my teacher believes it A man is driving a truckĪnd is on the highway going 70 MPH. Hello, my teacher and I had a bit of a bicker. The straight line path is an orbit, but it has no angular momentum. Momentum, but the reason is that the sun exerts a force on it. I am not sure I would say that the earth orbits the Time to go half a period is 0.177 years=64.6 days. The period T of an orbit is proportional to the cube of its Kepler's third law states that the square of The two point masses coincide would be infinite, but if we can cleverlyĭeduce the period of this orbit, one-half that period will be the answer There is no such thing as a point mass and the speed of the earth when Of course, this is not an orbit you will actually see in nature because The semimajor axis for a "dropped earth" is a 2= R E/2. The other extreme is an ellipse withĮccentricity 1 which is a straight line from the sun to the earth and so Where R E is the radius of the earth's orbit theĮccentricity of a circle is 0. Orbit has a semimajor axis equal to the radius of the circle, so a 1 =R E Law states that the orbit of a planet is an ellipse with a semimajorĪxis a and with the sun at one focus of the ellipse. (approximately circular) orbit is one year. Kepler's first and third laws and the fact that the period of earth's But, you do not need any of that stuff-all you need The sun and earth, the radius of the earth's orbit, and Newton's universalĬonstant of gravitation. The questioner sent me a bunch of data about the masses of If we stopped the earth in orbit and then let it fall straight towards the sun, how long would it take to reach the sun in seconds? The earth orbits around the sun because it has angular momentum.
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Real question is "why is the speed of light in a vacuum a fundamentalĬonstant of nature?" But, I have answered this many times before�see my faq Why don't you ask what is keeping it from going slower? The Is there something about theįabric of space that causes it to move at the speed it does? Limit is 3E8 m/s, why not any other number. What is stopping light from going any faster? Why is it that the upper Of older questions and answers processed by "Ask the Physicist!". Images below for information on the content of the books and for Now three Ask the Physicist books! Click on the book With the recent publication of PHYSICS IS.