jbriggs444's latest activity
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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
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It's not the symmetry that requires forcing, because Newton's 3rd is already symmetrical. It's the fake asymmetry that is forced into it... -
jbriggs444 replied to the thread Chain falling out of a horizontal tube onto a table.Since this is your attitude, I am out. Live long and prosper. -
jbriggs444 replied to the thread Chain falling out of a horizontal tube onto a table.If you have something to say, say it. Do not say that you already said it. I am not going to go back to prior posts to try to tease out... -
jbriggs444 reacted to Baluncore's post in the thread I Calculate acceleration from power/torque graphs with
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That is due to the supported gear ratio selection, decided by the manufacturer. If you plot engine power against vehicle road speed... -
jbriggs444 reacted to A.T.'s post in the thread I Is calling fictitious forces "not real" just about terminology? with
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Sean Carroll discusses this in other contexts in his recent podcast around 1:54:00... -
jbriggs444 replied to the thread Chain falling out of a horizontal tube onto a table.Which scenario are you contemplating here? I made it quite clear that I was writing about scenario 3. In this scenario there is nothing... -
jbriggs444 replied to the thread I Calculate acceleration from power/torque graphs.The power and torque lines should cross at most once (discounting the edge cases end where both torque and power are zero). The choice... -
jbriggs444 replied to the thread Curving of gravitational field lines.As the graphic shown by both @PeroK and @kuruman suggests, the "field lines" in blue are perpendicular to the "equipotential surfaces"... -
jbriggs444 reacted to Steve4Physics's post in the thread Curving of gravitational field lines with
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A line can't be perpendicular to a point. You probably meant to ask: "Aren't gravitational field lines always straight and directed... -
jbriggs444 replied to the thread Chain falling out of a horizontal tube onto a table.The element that was returned to the top never left the system. The impulse that brought it to momentary rest was an external force... -
jbriggs444 replied to the thread I Acceleration on an electric unicycle, how much does the rider have to lean?.Kingsong 18XL is rated at 2200 W and 104 Nm. One finds online that rated power and peak power differ by roughly a factor of two. One... -
jbriggs444 replied to the thread What is alfalfa used for?.As a legume and a non-grass, rotation of fields into alfalfa can be helpful for fertility and for anti-pest purposes. Also, pet rabbits... -
jbriggs444 replied to the thread 2 pulleys 3 masses problems.Is momentum conserved here? We have the external forces from the two pulleys and the external force from gravity. Do those always sum to... -
jbriggs444 replied to the thread A A single molecule diffusion in ideal gas.I do not know.