Recent content by Ariano AnnaG

Thank you, you were really helpful, with your advice I was finally able to solve it!

Thank you haruspex for your reply! So it would be FΔt=m1V1-m1V1i ? I'd say the coal is transferred perpendicularly, because there isn't a given angle in the problem statement. Is the book swapping solution (a) with solution (b) or is it me, dealing with the procedure?

1)In the first case the mass changes, in this manner: m1= m1i - k Δt impulse-momentum theorem: F1Δt=Δq FΔt=m1V1-m1iV1i I now can replace m1 with its definition and obtain: F1Δt= (m1i - k Δt)V1 -m1iV1i = m1iV1i - kΔtV1- m1iV1i = - kΔtV1 It is possible to remove Δt as it appears in both...

Thank you so much for your replies kuruman and haruspex despite the wrong organization of the post, I'm so sorry about that, I'm new to the forum but I promise I will learn from my mystakes.

I made a lot of mistakes and the problem is phrased in an ambiguous way and with missing data (angular velocity ω). However now I think I figured it out a bit better. Probably what created most of my confusion is the fact that the children is rotating the object above his head. However, I think...

Yes, the spring is horizontal. For the elongation of the spring to be constant, shouldn't the sum of the forces at the level of the mass be 0? Otherwise shouldn't the spring describe also an oscillation of harmonic motion while rotating? That is the reasoning I made to equalise centrifugal...

Thanks for the replies. I think you are correct. There is indeed a missing data which I guess should be the angular speed. As haruspex pointed out, the angular speed I used is relative to the harmonic motion of a spring and thus irrelevant in this case. However, given the angular speed, would...

you have k and m, so you can find angular speed, and I reported the problem word for word in the first post. Here's the diagram of the forces

the diagram of the forces acting on the toy is in the photo attached, it's quite small, between the datas and the drawing of the system. I tought it could have been solved using angular speed ( radq(k/m) ) In the problem there isn't any other data

Homework Statement A child is playing with a spring (k=100000 N/m, Li = 0.5 m). One of his toys (m=0.5 kg) is attached to the further extremity. The child is rotating the spring above his head on a horizontal plane, with a uniform circular motion. What is the elongation of the spring? I’m not...