Lnewqban's latest activity
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Lnewqban replied to the thread Correct statement about siphon used to empty water tank.Because the reasons explained above, statement (i) is only approximately correct. Please, see... -
Lnewqban replied to the thread Engineering Looking for recommendations for reference/textbooks on Flight Dynamics.Please, see: https://www.amazon.com/Illustrated-Guide-Aerodynamics-Hubert-Smith/dp/0830639012/?tag=pfamazon01-20...
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Lnewqban replied to the thread Correct statement about a reservoir with an outlet pipe.As the volume of the liquid contained inside the tank decreases, the air pressure above its surfaces also decreases. "The water will...
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Lnewqban reacted to A.T.'s post in the thread B A scenario of non-uniform circular motion with
Like.
Yeah, I did not understand that part of the question either. Since it's about any deviation from circular it doesn't really matter, but... -
Lnewqban replied to the thread B A scenario of non-uniform circular motion.The centrifugal effect should induce a traction effect on the road. Therefore, increasing the rotational velocity of the object should...
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Lnewqban reacted to demej00's post in the thread Calculate minimum RPM to self-balance a CMG on two legs with Like.
I have not had it at 1500 rpm, I have had it up to 800 rpm and yeah it was jumping around quite a bit even though I had roughly balanced...
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Lnewqban replied to the thread HP Required to move a robot 10meters at 1.5m/sec.Perfectly horizontal movement? Geared rails? How much acceleration you need? How will the mass be stopped?
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Lnewqban replied to the thread Mechanics homework confusion.Welcome! I believe that you can consider a triangle of sides 1.25-2-1.25, assuming that the two strings coincide with the center of mass...
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Lnewqban reacted to haruspex's post in the thread Rolling without slipping on a curved surface with Like.
No, ##\Delta s## is greater than that because of the curved surface. Consider e.g. R only marginally greater than r.
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Lnewqban reacted to haruspex's post in the thread Rolling without slipping on a curved surface with Like.
Ok, here’s what is wrong with the AI solution. First, "the CM acceleration is ##(R-r)\ddot\theta##, not ##a##” is wrong in that it is...
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Lnewqban replied to the thread Calculate minimum RPM to self-balance a CMG on two legs.Welcome! Are you sure about your bicycle tire and wheel being perfectly balanced and able to remain intact at the recommended 1500 rpm...
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Lnewqban reacted to Klystron's post in the thread RIP Jane Goodall (91), primatologist and conservationist with Like.
I have a Jane Goodall anecdote that I think about often during these strange days. While visiting at Stanford University in Palo Alto...
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Lnewqban reacted to Astronuc's post in the thread Coccidioidomycosis, deadly fungal disease, no effective cure with Like.
https://grist.org/health/valley-fever-arizona-fungus-climate-change/
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Lnewqban replied to the thread 2 wires attached to another wire attached to a block.Welcome! :cool: When your fingers are holding a suspended bad of groceries, do they feel increased or reduced weight of the...
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Lnewqban reacted to haruspex's post in the thread 2 wires attached to another wire attached to a block with Like.
The other cords are not attached to the weight. Each body only "knows" about the forces that act directly on it. The suspended body is...
