jbriggs444's latest activity
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jbriggs444 reacted to PeroK's post in the thread B How to derive the 4 laws of motion using Calculus? with
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You can't. The laws of motion are physical laws, independent of the foundations of mathematics. The laws can be stated in mathematical... -
jbriggs444 replied to the thread Correct statement about siphon used to empty water tank.I dislike this question. It is full of ambiguities. It appears that by "at maximum height" they mean the maximum height to which the...
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jbriggs444 reacted to A.T.'s post in the thread B A scenario of non-uniform circular motion with Like.
There are no perfect circular paths in nature. Even a passive object without the thrusters will not move on a perfect circle. So making...
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You could: a) State that you believe the question posed can’t be answered and briefly explain why. b) Propose a revision to make...
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jbriggs444 reacted to PAllen's post in the thread I Synchronizing clocks at different locations to measure speed of light with Like.
Note, an invariant fact is that if you move the clocks away and then back together with identical acceleration profile, they will be in...
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jbriggs444 replied to the thread I Synchronizing clocks at different locations to measure speed of light.As I understand things... Definition: two clocks are said to be "synchronized" if their readings when located at simultaneous events...
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jbriggs444 reacted to A.T.'s post in the thread I Is calling fictitious forces "not real" just about terminology? with Like.
Physists of the past have been brilliant at describing nature using math, but terrible at choosing the right words for it. Both naming...
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jbriggs444 replied to the thread How fast is the fly's shadow moving?.Yes, that passage is apt. An absolute bearing (or heading or course) would typically use a 360 degree rosette as described above with 0...
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jbriggs444 replied to the thread A three month long summer vacation from public school seems stupid.What about literature from Edward Everett Horton?
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jbriggs444 reacted to BillTre's post in the thread A three month long summer vacation from public school seems stupid with Like.
Woe, woe, woe. When I was a kid (different times) Saturday mornings were very important to my education. I learned a lot of sarcasm and...
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jbriggs444 replied to the thread How fast is the fly's shadow moving?.I suspect that the intended meaning mean that the fly is flying on a heading of 204 in still air. "Bearing" is the direction from a...
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jbriggs444 replied to the thread I Is calling fictitious forces "not real" just about terminology?.I would say that nothing physical needs to change its state of motion. It is just coordinate systems. Scribbles on pieces of paper. This...
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jbriggs444 reacted to PeroK's post in the thread I Is calling fictitious forces "not real" just about terminology? with Like.
The simplest explanation, IMO, is this: If you measure an object to be accelerating, then there are two different reasons for this: 1)...
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jbriggs444 replied to the thread I Is calling fictitious forces "not real" just about terminology?.Yes. I agree with pretty much everything you have written about the distinction between real and fictitious forces. A real force (or...