Big Ben is a clock in London.
He is about 157 years old!
He was built because the Palace of Westminster was destroyed by fire in 1834, so in 1844, it was decided the new buildings for the Houses of Parliament should include a tower and a clock.
How does Big Ben work?
Whats wrong with Big Ben?
Lately people have noticed that the clock, famous for keeping people on time, has been running on his own schedule. People working in the clock tower have detected that Big Ben was 6 seconds off!
But what could we do to fix him? We did many tests to try and find away to fix Ben. We tried 3 tests on weight, angle of release, and length of the pendulum.
For weight, we had 1-5 washers. First we took string and tied it around a meter stick. At he end was a paper clip, at the end of that paper clip was 1 washer. We counted for 1 minute and it swung 42 times.
We did this 3 more times with 1 washer and for 1 minute and got the average for 1 washer, 44. Next we did that for the rest and kept adding washers. Next we tested 2 and we got the average of 41. Then it was 3, and we got an average of 46
After that we tried 4 and got an average of 46. Finally we tried 5 washers, we did 3 tests and got an average of 49. From all of our data we found that if you have more weight the pendulum will go faster.
Angle of Release
Are very next test was angle of release. With this one we tried to release the string at different degrees, 90, 80, 70, 60, and 50. This time we measured the sting and then put it back on the meter stick. Each angle was tested 3 times for 1 minute.
Our average for 90 degrees was 39 swings. For 80 it was 36 swings. Then for 70 degrees it was 35. Next the average for 60 degrees was 27. Finally for 50 degrees the average was 25.
So we concluded that the best angle for the pendulum to have more swings was 90 degrees.
Our final test was on length. We had 6 trials. We tested 10cm, 20cm, 30cm, 40cm, and 50cm. Every length was tested for 1 minute 3 different times. Our average for 10cm was 46, 20cm was 43, 30cm was 52, 40cm was 43 and then 50cm was 46.
We found that if the pendulum is too long then it wouldn't stay straight and if the pendulum was too short then it would go really fast and not keep a steady rhythm. The perfect length for us was 30cm because it wasn't too short or too long.
Our graphs and data showed us, if you have a pendulum of 30cm and 5 washers but release it at a 90 degree angle you will have the perfect combination of weight, length and angles.
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Public - 9/28/16, 12:43 AM