Next we had a look at the large items around the house like sofas and beds and bounced about to test the springs. Next we found some shock absorbing springs on the car.
Looking for springs on the car |
We discussed the 2 main types of springs, compression and tension springs, and investigated each type.
Stretching a tension spring |
Squashing a compression spring |
Then it was time to find more springs in objects around the house and take some of them apart.
Watching springs compress in the hole punch |
Taking apart a pen and finding the spring |
Taking apart the weigh meter |
We talked about the elastic limit and demonstrated with a weak spring what happens when you pull it too much - it doesn't return to shape. We then conducted an experiment to see how a springs length changes with the amount of force applied to it. This involved counting weights and measuring. We soon passed its elastic limit.
Weights hanging off a (now unspringy) spring |
R used the data from the experiment to make this graph in excel. Can you spot the elastic limit?
Finally for a bit of fun we made some springy bird mobiles. The birds flap and bounce when they are pulled downwards.
Next we'll be looking at gears, wheels, leavers and more....
No comments:
Post a Comment