Hopefully people see this. Neil and I did our shot today, and I want to put some key ideas out there for everyone that we didn't take into account. We did not take into account the height of the cup when doing our calculations. This had an impact on both but especially on the shallower of the two angles. This is because the angle closer to the horizontal angle does not get as much height as its complimentary angle. When you visualize this, you can see that the parabola is much flatter when the angle is closer to horizontal. It is important to take the height of the cup into account for this reason. We did not, and it affected the accuracy of our launch. If you also made this mistake, there is a solution. Drawing a diagram will really help you to understand what I am about to suggest. When looking at the diagram and setting up the launch, you see that the position you have solved for is at the center of the cup. If you launch it like this, you will ultimately hit the side of the cup. To correct this mistake, you have to think about how to get the ball over the edge of the cup. This would mean moving the cup so that the back of the cup is placed where the front of the cup is. For example, if the diameter of the cup was 7 cm, this meant moving the cup 7 cm closer to the launcher. By doing this the arc would end inside the cup and not outside of it. For the greater of the two angles, it is also important to make the back of the cup line up with the position you solved for. This is very hard to explain without any type of diagram, so try to process it. If you need clarification please ask me on here or in class tomorrow so I can better explain it.
What is the height of the cup, or does it vary. I saw people using different size cups today in class when testing and was wondering if we are going to choose the cup or if there is a standard?
Where is the link? Sorry if this is a dumb question...
ReplyDeletethe title itself i think
ReplyDelete-NP
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ReplyDeleteHopefully people see this. Neil and I did our shot today, and I want to put some key ideas out there for everyone that we didn't take into account. We did not take into account the height of the cup when doing our calculations. This had an impact on both but especially on the shallower of the two angles. This is because the angle closer to the horizontal angle does not get as much height as its complimentary angle. When you visualize this, you can see that the parabola is much flatter when the angle is closer to horizontal. It is important to take the height of the cup into account for this reason. We did not, and it affected the accuracy of our launch. If you also made this mistake, there is a solution. Drawing a diagram will really help you to understand what I am about to suggest. When looking at the diagram and setting up the launch, you see that the position you have solved for is at the center of the cup. If you launch it like this, you will ultimately hit the side of the cup. To correct this mistake, you have to think about how to get the ball over the edge of the cup. This would mean moving the cup so that the back of the cup is placed where the front of the cup is. For example, if the diameter of the cup was 7 cm, this meant moving the cup 7 cm closer to the launcher. By doing this the arc would end inside the cup and not outside of it. For the greater of the two angles, it is also important to make the back of the cup line up with the position you solved for. This is very hard to explain without any type of diagram, so try to process it. If you need clarification please ask me on here or in class tomorrow so I can better explain it.
ReplyDeleteIf you took the height of the cup into account, those extra steps should not be necessary!
ReplyDeleteWhat is the height of the cup, or does it vary. I saw people using different size cups today in class when testing and was wondering if we are going to choose the cup or if there is a standard?
ReplyDeleteMr. Crane,
ReplyDeleteIf we want to work on the lab tomorrow morning, what time should we get there?
Emma
I will be there by 7:20. You will have access to the lab.
ReplyDelete