Sorry.
Basically I need to develop a trajectory model for 3-point shot in basketball with a given launch, angle and spin rate. I cannot find an equation for the lift coefficient.
How can I find an equation to calculate the lift coefficient on a basketball at different launch velocities?
I looked at different papers explaining the physics of basketball throws but all i could find was an equation for the drag coefficient: -mv +1/2 ρ A Cd v^2 = mv
What falling speed? The one from the peak or the initial one?
So, the physical impact between the two bodies occurs between time 154 to 198 yea? Say i consider the data recorded from 154 to the peak, if i integrate it once I would get the velocity vs time graph, and if i integrate that again...
The accelerometer I used had a range of 2g. So you suggest 3g?
The physical impact begins when the acceleration hits the x-axis right? Does the pick of the graph represent the maximum indentation of the striking mass on the shin guard?
I have performed an impact test on different football shin guards to assess their performance. I am however confused with the readings measured by the accelerometer I have used. The sensor was attached to a striking mass of 4.3 kg which was dropped at different heights.
The graph I have attached...
Sensor was attached to a falling mass of 4.3 kg. The mass was dropped at different heights (this graphs shows acceleration measurements for impact drops of 20 cm). The striking mass was dropped onto a football shin guard which was placed on a metal flask. I assumed that the graph is messy...
I have actually been struggling reading my sensors measurements. I have attached an acceleration vs time graph i have developed with the measurements taken. Can you help me understand it?
Yes, I see what you mean I don't know how I have never realized that.
Is calculating the force producing this acceleration of any use then?
I'm sorry I don't think I understand what you mean when you say the impact begins when the force between the bodies in non-zero.
I see.
Anyway, getting back to the original problem. So the g-force converted in Newtons is simply the force exerted by the mass on the impacted body. Now, by looking at the results, how can I define at what force the impact occurs? Is the peak the maximum indentation?
By defining this and...
Im confused then. If the force is mass times acceleration and the mass is always the same, and so its the acceleration of gravity, then impact force should be constant too?
That's what I can't understand. Then all of a sudden the acceleration peaks again at almost 2g.
Is the f-force in Newton equal to the impact force?
I am doing this for dissertation and I am so confused with the results!
Yes, I would assume that the first part corresponds to the body falling.
Does the collision occur at at measurement point 27? I would think that the peak of the graph corresponds to the maximum indentation after which the body raises again.
Yes, there was bouncing involved.