I need help coming up a source of error for this like lab thing that we are doing class. So like we took this string with a rubber ball on it and the string went through a glass tube, and on the end of the string, so the like opposite end of where the ball (rubber stopper) is, we added different masses, or washers. THen, we spun the string horizontally. THis was like the uniform circular motion lab. So I 3 errors already, but I need one more...the ones I have are the timer (it was like super hard to start and stop where the revolution was starting and stopping)...um then I like had the string kept moving changing the radius...and then like how the movement wasn't always horizontal...so does like anyone have any ideas as to one more error? Thanks a mill mill!

Question

I need help coming up a source of error for this like lab thing that we are doing class. So like we took this string with a rubber ball on it and the string went through a glass tube, and on the end of the string, so the like opposite end of where the ball (rubber stopper) is, we added different masses, or washers. THen, we spun the string horizontally. THis was like the uniform circular motion lab. So I 3 errors already, but I need one more...the ones I have are the timer (it was like super hard to start and stop where the revolution was starting and stopping)...um then I like had the string kept moving changing the radius...and then like how the movement wasn't always horizontal...so does like anyone have any ideas as to one more error? Thanks a mill mill!

Answer 1

The movement cant be horizontal, but is always at some angle. Knowing that angle and keeping it uniform is important.

Timer is one, of course, and the counting. Wondering if you timed one rev, or timed say ten revs and then divided by ten...there is a big difference in error.

Maintaining constant r is one.

Finally, the force of resistance between the string and the glass tube(were it makes a 90 degree turn) was neglected. That can be reduced if a nylon or propolene string was used, and the tip of the glass tube was lubricated.

Finally, the error in measuring mass, both on the revolving mass, and the weight holding the string down.

Answer 2

THANKS!!!!!!!!!!!!!!!!!

Answer 3

One more source of error in your uniform circular motion lab could be the presence of air resistance. When the rubber ball is moving through the glass tube, it will experience air resistance, especially if it is spinning at high speeds. This force of air resistance can affect the motion of the ball and cause deviations from the expected circular path.

To address this error, you can try minimizing the effect of air resistance by conducting the experiment in a vacuum or by reducing the speed of the spinning motion. Additionally, you can repeat the experiment multiple times and take an average of the measurements to minimize the impact of random variations caused by air resistance.