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  1. H

    How far will the middle point of the beam sag under load?

    He didn't give me this problem as a homework. I wanted to solve it without his help. He just told me that my working is wrong and to try it again. :)
  2. H

    How far will the middle point of the beam sag under load?

    Yeah no worries I know which one is the base and which one is height. Thank You for your help guys. I solved it with your help finally :)
  3. H

    How far will the middle point of the beam sag under load?

    So for the deflection I found a formula P.L^3/(48.E.I) The right answer should be 3,33cm I calculated Ix and put it there to the formula and what I got is 3,39cm. Is my work at least a bit correct?
  4. H

    How far will the middle point of the beam sag under load?

    I found this. How can I make from Ix and Iy one I to put it to the equation? Just by pytagoras theorem?
  5. H

    How far will the middle point of the beam sag under load?

    I decided to solve it on my own. But I have one question. How could I calculate the Moment of Area of the cross-section of the beam? That's the only thing I have no idea what it is and how to calculate it.
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    How far will the middle point of the beam sag under load?

    I'm a high school student and we made this experiment at school and I just wanted to know if I could calculate it with some formula. But I think that I don't have enough knowledge to solve it by myself. Is there anybody who would like to solve it for me please?
  7. H

    How far will the middle point of the beam sag under load?

    The beam is supported on the ends of it. Length of it is 100cm. The other two dimensions are 5cm and 0,5cm. The cross section is rectangular. I'm a bit confused. Hopefully I wil somehow solve it.
  8. H

    How far will the middle point of the beam sag under load?

    Thank you very much! No I haven't heard about it so I should check it. So is it solvable from the low amount of information that is given?
  9. H

    How far will the middle point of the beam sag under load?

    I tried to use F/S = E.ε to find the new length after deformation and than use pytagoras theorem in right angled triangle to find how much did the middle point lower. But it was said to me that my method is wrong and that there exists some formula to solve it. Can you please tell me where could...
  10. H

    Why is the velocity of a jump on Mars the same as on Earth?

    Aha. So for correctness should I solve it from equation m.g.h(1) = m.a.h(2) right?
  11. H

    Why is the velocity of a jump on Mars the same as on Earth?

    Thank you very much sir. Now everything makes sense to me. I really appreciate it!
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    Why is the velocity of a jump on Mars the same as on Earth?

    Homework Statement Good evening, I have a homework where the question is "How high will person jump on Mars?" Homework Equations v2 = 2.amars.h1 V2 = 2.g.h2 The Attempt at a Solution I know everything to solve it. I can solve it by h1 / h2 . In this created equation the only unknown is...
  13. H

    B What is the formula for this sequence for n-th number

    Hello, i have a sequence {1,2,13,62,313...} and I have to find out the rule for n-th number. I've found out that every next number is five times bigger but then is added or subtracted 3. For example 1x5 -3 = 2 and 2x5 +3 = 13 and so on. Can you please give me some advice how to create the...
  14. H

    Throwing two stones, find the velocity of the second stone

    I solved it thank you very very much! And sorry for being anoying
  15. H

    Throwing two stones, find the velocity of the second stone

    Yeah It should be initial velocity. My bad.
  16. H

    Throwing two stones, find the velocity of the second stone

    Man/gun applies force during the interaction or am I wrong?
  17. H

    Throwing two stones, find the velocity of the second stone

    Wait a second please. I'm confused. My current opinion is that a shooted bullet has to have greater acceleration because it will fall down faster than an object which was released from rest. Bullet is in my opinion pushed by the gun thus he has to have greater acceleration. Please can you...
  18. H

    Throwing two stones, find the velocity of the second stone

    Why? Because I think that it's acceleration has to be greater than g because the second stone will "catch" the first one. There is nothing written there about initial velocity.
  19. H

    Throwing two stones, find the velocity of the second stone

    Homework Statement A man let a stone from height 49 metres. After 1 second he threw a second stone. Both stones fell on same time. What is the velocity of second stone? Homework Equations h=1/2gt^2 h=1/2a(t-1)^2 The Attempt at a Solution So I assume that if he let the first stone then the...
  20. H

    Why is this equation about adding pure substances correct?

    I understand what you want to tell me but can I ask something? Why by adding pure B the volume does not change?
  21. H

    Why is this equation about adding pure substances correct?

    Thank You sir. I really appreciate your help.
  22. H

    Why is this equation about adding pure substances correct?

    Hello, I have a little problem. I try to find out why the second equation in the picture is correct. How can I get it? Down on the paper is what I did. Where did the (1+V2/V1) disappear from the right side of equation? Thank You for every help.
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    Forces on an object in vertical circular motion

    So basically if I understood everything correctly. Tension of the rope is compensating weight in every position? Does it mean that at 6 o'clock position if we had given the max tension of the rope we can calculate in what speed will the rope tear up right? The equation would be like this...
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    Forces on an object in vertical circular motion

    So am I right if I say that there are only weight and force of the rope? How is then possible that the object won't stop "in the 6am position"? Because it's too fast?
  25. H

    Forces on an object in vertical circular motion

    Homework Statement Imagine a vertically placed clock. What forces have an effect on the object when it is in the position of 3am? Homework Equations No need od equations i guess. The Attempt at a Solution So I figured out that when the object is in the position of 12am then weight of the...
  26. H

    In how many seconds will the n-th wagon pass next to me?

    Thank You guys! I finally got it!
  27. H

    In how many seconds will the n-th wagon pass next to me?

    Nope. I can't figure anything out. I will make a break for a while and then I will try it again because now I can't do it. Thank You you for everything. I really appreciate it.
  28. H

    In how many seconds will the n-th wagon pass next to me?

    What I did this time is this. vn = vn-1 .atn which means a=(vn -vn-1) / tn and that's what I put in equation s=vn-1.tn + 1/2.a.tn2 what I got is this tn = 2s/(vn + vn-1) Can this somehow help me? I'm really sorry for my stupidness but I can't figure it still out.
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