![]() An initially stationary object which is allowed to fall freely under gravity drops a distance which is proportional to the square of the elapsed time. The acceleration due to gravity is equal to this g. "Under an assumption of constant gravity, Newton's law of universal gravitation simplifies to F = mg, where m is the mass of the body and g is a constant vector with an average magnitude of 9.81 m/s2. It's not the fall that kills you, it's the sudden stop. If there is enough compression, you get injured.Īlso, if you get too near a black hole, the acceleration is not uniform over your body for other reasons, and you can be torn apart in freefall. The deformation causes pressure which applies force to the front half (and all the inside parts) of you forcing the rest of your body to accelerate too. Now your body must deform because all parts of it are not at the same instantaneous velocity. In that case, the jet is pushing on the back of your body, but there is no force pushing on your front. Non-uniform acceleration is what you experience when you are being pushed by an object, say, because you are in a jet aircraft and are trying to perform a high speed turn. Each part of your body is being uniformly accelerated in exactly the same way. That's what orbit is: uniform acceleration towards earth. If you were falling toward a very massive object (and were not close enough to experience significant gravitational variation over the space of your body), you would feel nothing. Uniform acceleration would be a uniform gravitational field. Uniform acceleration doesn't hurt you at all, it's only non-uniform acceleration that's potentially dangerous. We make our world significant by the courage of our questions and by the depth of our answers. For more open-ended questions, try /r/AskScienceDiscussion | Sign up to be a panelist!.Looking for flair? Sign up to be a panelist!.Neuroscience, Neurology, Neurochemistry, Cognitive NeuroscienceĪsk Anything Wednesday - Biology, Chemistry, Neuroscience, Medicine, PsychologyĪskScience AMA Series: Long COVID and Blood ProtiensĪsk Anything Wednesday - Economics, Political Science, Linguistics, AnthropologyĪskScience AMA Series: NASA Software CatalogĪsk Anything Wednesday - Physics, Astronomy, Earth and Planetary ScienceĪsk Anything Wednesday - Engineering, Mathematics, Computer science Medicine, Oncology, Dentistry, Physiology, Epidemiology, Infectious Disease, Pharmacy, Human Body Psychology, Cognitive Psychology, Developmental Psychology, Abnormal, Social Psychology Social Science, Political Science, Economics, Archaeology, Anthropology, Linguisticsīiology, Evolution, Morphology, Ecology, Synthetic Biology, Microbiology, Cellular Biology, Molecular Biology, Paleontology Mechanical Engineering, Electrical Engineering, Structural Engineering, Computer Engineering, Aerospace EngineeringĬhemistry, Organic Chemistry, Polymers, Biochemistry Mathematics, Statistics, Number Theory, Calculus, AlgebraĪstronomy, Astrophysics, Cosmology, Planetary FormationĬomputing, Artificial Intelligence, Machine Learning, ComputabilityĮarth Science, Atmospheric Science, Oceanography, Geology Theoretical Physics, Experimental Physics, High-energy Physics, Solid-State Physics, Fluid Dynamics, Relativity, Quantum Physics, Plasma Physics /r/AskScienceDiscussion: For open-ended and hypothetical questions.FAQ: In-depth answers to many popular questions.Weekly Features: Archives of AskAnything Wednesday, FAQ Fridays, and more!.Be civil: Remember the human and follow Reddiquette. ![]() ![]() Report comments that do not meet our guidelines, including medical advice.Downvote anecdotes, speculation, and jokes.Upvote on-topic answers supported by reputable sources and scientific research.Answer questions with accurate, in-depth explanations, including peer-reviewed sources where possible.Please read our guidelines and FAQ before posting
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |