- #1
Chynkinese
- 4
- 0
Please ignore the periods in the diagram as it won't allow me to properly draw it otherwise.
I have an object, attached to a string, rotating uniformly in a circle but at an angle to the horizontal plane. It is going at 80RPM (so relatively slow). How would one go about measuring the length from stationary point o to moving object a? the length can range anywhere from 40cm to 70cm and the accuracy for the measurement should IDEALLY +/- 0.5cm (doesn't mean it has to since real life is never ideal).
ie......o
....../
....../
....../
...../
...a
Nothing can be attached to "a" unless it is extremely light (such as reflective tape for a laser or something).
I have a very simple idea but the accuracy is easily +/- 1cm to 2cm or so. It's a simply ruler with a pointer attached and I slide it as close as possible. And I do the same for the vertical (either that or I measure the angle, whichever is more accurate). It goes something like this:
ie...___Ruler___o
...|.../
...|.../
...|.../
...V./
...a
I thought about using a laser somehow but I can't seem to find any equipment suitable for this.
I have an object, attached to a string, rotating uniformly in a circle but at an angle to the horizontal plane. It is going at 80RPM (so relatively slow). How would one go about measuring the length from stationary point o to moving object a? the length can range anywhere from 40cm to 70cm and the accuracy for the measurement should IDEALLY +/- 0.5cm (doesn't mean it has to since real life is never ideal).
ie......o
....../
....../
....../
...../
...a
Nothing can be attached to "a" unless it is extremely light (such as reflective tape for a laser or something).
I have a very simple idea but the accuracy is easily +/- 1cm to 2cm or so. It's a simply ruler with a pointer attached and I slide it as close as possible. And I do the same for the vertical (either that or I measure the angle, whichever is more accurate). It goes something like this:
ie...___Ruler___o
...|.../
...|.../
...|.../
...V./
...a
I thought about using a laser somehow but I can't seem to find any equipment suitable for this.