#physicsquestions what happens to the #tension in the #string? #physics #physicsteacher #newton

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Rhett Allain

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The readings were not visible. You were unclear as to when you were interested in the tension. As you pushed the cart, the tension would have risen.

jackieking

F- T=ma. then T=F-ma. If a increases such that F-ma <0 then T<0

tchounkwajustin

That's also a tricky video challenge. How to keep reflection off the display when both camera and object are moving.

spelunkerd

T=(m1g)/(1+m1/m2), no friction. if m1=m2=1 than T=g/2, where in the static case, T=g.

JasonAStillman

I had a feeling but guessed wrong. I was thinking of vectors. Since T is mg and the vector is down but then translated in one direction on the x axis, then applying force the opposite way would be a vector in the opposite of mg. So adding the vectors would show a decrease in acceleration which means a decrease in force

michaelmanning

non ho capito quale sia la questione, dicono come quella dell'immagine, ma lei ha spiegato tutto .
non ce questione.
le faccio una proposta:

abbiamo un sasso legato allo spago e dieci 20 misure a dietro un altro sasso legato allo spago,
posato in equilibrio ai bordi di una finestra .
dalla stessa finestra di 10 piani buttiamo il primo sasso,
questo cade e dopo molte misure, il secondo sasso viene attirato giù,

avrei piacere di questo che dei suo caso facile,

che comunque mi piace, poiché il fatto che la tensione scende è una cosa importante, per questioni meccaniche,
anzi i due pesi tendono verso la nullità, della tensione.

anche se il peso fosse in direzione inclinata e fosse lunga 100 misure, probabilmente arrivati, la tensione conterà sono per questioni molto sofisticate.
a parte quanto, il piano e inclinato.

ma visto un video gif 6 mesi fa,
per una cosa di un cerchio di palline,
e quella cosa la collego ora, se la corda è corta, quella dei due sassi, il sasso dietro, passa davanti al primo sasso e poi l'altro passa davanti,
e quindi le ho chiesto di spiegare una cosa stupida . lasci perdere.

FrankPocoEU

I was thinking: this man is really good at explaining physics - he should be a teacher. Then I saw you're a professor....

kriswillems

But you didn't ask what happens to the force after it stops moving and starts to return to the resting position. You asked what happens "after you push it" which to me implies immediately after you pushed it while it's still moving in the direction you pushed. :-(

BrianGUK

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