Sorry I don't have the x-t table for the first graph, and i can't recreate the graph again since, i don't know how many fps i did when analysing it, so it would be different. Alternatively you could approximate the points. Sorry!
Sure no problem.
http://tinypic.com/view.php?pic=21989vk&s=8#.U_8Xi7ySyec
http://tinypic.com/view.php?pic=b8ssww&s=8#.U_8XvLySyec
These are different trials with different densities of spheres
Sorry i wasn't too clear. The height of the water is 40cm, and the tube is much longer. Yeah the tube is uniform throughout, and indeed it does not fall straight in the center but falls at an angle hence hitting the side of the tube.
I didn't say the velocity plot is correct. The whole purpose of this post is that the velocity graph is a bit strange! And if anyone could provide some pointers why the velocity is so.
The water is homogeneous. After replying the video 15 times or so. I've noticed that the marble has some slight spin on its way down, but I sort of think the spinning become a little faster near the end. But I don't think it is would be that significant to cause my data to be like this. Also At...
Yeah i think so to. Chart of distance vs time looks fine though, it is linear so there probably wasn't any mistake when plotting the data. The link to distance vs time graph: http://tinypic.com/view.php?pic=344qo1t&s=8#.U_5RuLySyec ignore the red, it is the x-axis displacement.
i did...
I think Reynolds' number would be greater than 1 for water which would mean that stokes law would not be very reasonable.
I calculated Re to be 8475. Re=1000*0.565*0.015/0.001 =8475. Therefore Re>>1
The experiment looks basically, a ~60cm cylindrical tube diameter of 3.8cm. Water is filled to 40cm and the marble is dropped above the surface of the water, sometimes the bottom of the marble is partially submerged in the water when release. The time for it to drop 40cm was recorded. And the...
Yeah, sorry i meant accelerate more slowly than 9.81m/s/s.
We tried to keep the marble on the surface, but sometimes the bottom of the marble is partly submerged. Yes I think I can find where the marble is at a point in time.
http://tinypic.com/view.php?pic=30vk8x1&s=8#.U_3Hr7ySyec here is a...
Yeah it does. It was only a 40cm tube. The drag force was from stoke's law i think. Fd=6πμvr. I don't think it should be a straight line either. Since its gaining drag the ball should decelerate from 9.81m/s/s, therefore as i mentioned above, it should be a square root looking graph.
Homework Statement
So, I am having trouble trying to understand my results. The experiment was marble (1.5cm & 5gram) was dropped on the surface of water, in a 40 cm cylindrical tube roughly 4cm diameter. The graph is negative, since the I used a program to analyse the velocity.
Homework...