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Oh, hi! With all this talk of shoes, I've been wondering how we could test a shoe to see how good it is. So I decided we'd do an experiment testing the friction of our shoes! Friction is the force that resists movement between 2 things that are touching. In other words, the friction between our shoes and the floor is what keeps us from slipping and sliding around all over the place! Here's what you'll need:

1. Shoe 2. Rubber Band 3. Tape 4. Ruler 5. Pencil and Paper for Notes

What to do:

1. Have a parent help you cut the rubber band so that it's like a string instead of a loop. Then tape or tie the rubber band to the back of your shoe.

2. Measure and write down the length from the shoe to the other end of the rubber band.

3. Slowly start pulling the rubber band straight back. Try to keep it as straight back as possible, and not diagonally up or down. As soon as the shoe starts to move, measure the new length of the rubber band and write it down in your notes.

4. Now go ahead and try it with different shoes or different types of floors. Make sure to take notes so you can keep track of your results.

What's going on?

Like I said before, one of the reasons we wear shoes in the first place is because the friction between the shoe and the floor keeps us from sliding around. It's also what made that rubber band stretch before the shoe started moving. The more friction there is, the more you'll have to pull or push that shoe to get it to move. Different types of shoes and floors will have different amounts of friction between them.

Did you notice?

Did you notice that the rubber band had to stretch more to get the shoe to start moving than it did once it was already moving? That's because there are 2 different types of friction. The friction between 2 things that aren't moving yet is called "Static Friction." The friction between 2 moving objects is called "Dynamic friction." As long as everything else stays the same, the force of static friction should be greater than the force of dynamic friction. In other words- it should be easier to pull that shoe once it's already moving.

Things to think about:

It seems to me like it's usually harder to start doing things than to keep on doing them. Even good things like Mitzvot. Can you think of some examples of good things you do that were harder before you started, but got easier once you began? How about some new things you could start doing now that might be hard at first?

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Anonymous monsey December 22, 2016

very interesting. amazing how it works hashem created a really cool world Reply

Anonymous February 1, 2016


terri zimmmerman canada alberta January 16, 2016

hmmm interesting Reply

Anonymous China truck January 6, 2016

Third or big. U. Our Reply

Chaya Mushka cohen Kirkland April 29, 2015

science I don't like this it is boring Reply

Anonymous antartica October 30, 2014

suckssss can't even see the whole screen how ca I do it? Reply

kalb scott October 16, 2014

i love sicne Reply

Maddy Bali, Indonesia October 2, 2014

Thank You This was great I am not jewish but this sight helps me a lot!! Reply

Anonymous Auckland August 20, 2014

Very nice explanation Reply

Anonymous USA May 20, 2014

what hypothesis could i use for this? Reply

Anonymous sydney April 3, 2014

cool cool cool Reply

Anonymous February 3, 2014

Awesome the idea of yuor experiment is really nice...love it..:].... Reply

Queenie England February 1, 2014

Science project This website has helped me a lot. I 'm definitely using this for my project. It really helps me understand friction. Great website!!! Reply

Anonymous November 25, 2013

cool thank you Reply

Alyssa October 22, 2013

This is a really nice one.I suddenly woke up from my sleep the other day and recalled that I had this activity. I found this after an hour. Thank you soooo much Reply

Lilliana Pate NSW, Australia August 8, 2013

Gonna use this! I can't wait to use this for my assignment! Thanx soooo much! Reply

resnaaaaaa ee.uu June 24, 2013

cool staff In my school we had a Project like this and actually we had a really good grade while using this! thn+ank you! really cool!!!!!1 Reply

brad Cruz May 30, 2013

Thanks This is a very educational teaching experiment Reply

Maia April 18, 2013

It depends on how heavy the object is Reply

Shivani London, England February 26, 2013

So cool!!! We did that at skl with our friend in science it was soooo much u can do it at home as well!!! Reply