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....