Recent content by g9WfI

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    Does Poiseuille's Law apply for vertical motion of fluids down a tube?

    I see. I've got a much better looking graph now. Thanks a lot :)
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    Does Poiseuille's Law apply for vertical motion of fluids down a tube?

    I investigated the flow rate of differing dilutions of glycerol through an orifice of a vertical tube and obtained the following: I'm looking for a way to quantify these results so looked to Poiseuille's Law; I'm pretty sure my graph does not show inverse proportion? Could anyone advise me as...
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    Determining v from momentum / impulse

    Answer is (a) I thought it would be (b) due to conservation of momentum - so final momentum of the hockey stick is equal to the initial momentum of the ball. I assume this isn't correct because there are other external forces acting (air resistance?) Is that sound?
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    Velocity-distance graph for a freely falling body

    I get v = 9.8 x √ (s/4.9) Putting that into a graphing calculator I get a graph which looks like C, but I wouldn't have been able to recognise that myself :/
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    Velocity-distance graph for a freely falling body

    Ah - 1/t So as t increases, gradient decreases. So answer is C.
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    Velocity-distance graph for a freely falling body

    My reasoning: Gradient of graph = v/s = t t increasing therefore gradient increasing So graph B The answer is C.
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    Work done against resistive forces by comparing Ek and work done

    Thank you so much!
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    Work done against resistive forces by comparing Ek and work done

    Missed units in the photo - J Answer is 110 000 J
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    Vectors - Aircraft's velocity relative to ground

    I attach my working below - my angle is correct according to mark scheme but magnitude isn't (should be 230). I think it's odd that my resultant velocity on a windy day is larger than velocity in still air, but apparently my angle is correct? I've been told that I've calculated the airspeed it...
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    Solving Vector Diagrams: Finding Displacements & Velocities

    Here is my attempt at the vector diagram: Could anyone give me any clues as to where to go from here? Is this diagram correct? I tried finding θ using inverse tan 50/15 but I don't think I can do that because that's mixing up velocity and displacement. EDIT: I copied and pasted the incorrect...
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    How Do You Solve Equations with Variables V, U, and T?

    Thank you all so much for your help. I've been able to work out the answer.
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    How Do You Solve Equations with Variables V, U, and T?

    So sorry, I meant acceleration, final velocity and t are unknown. On attempt, I assumed v = 0 Then used: s = ((u + v)/2) t 5 = 12/2 t t = 0.83 s
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    How Do You Solve Equations with Variables V, U, and T?

    Hi, I'm new to the forum so I'm not so sure if I've formatted this correctly :p I don't really know where to start with the question above as there are three unknowns (v, u, and t). Answer is 0.53s or 1.9s - I'm so grateful for any help. Many thanks.