A sample worksheet that kids create as we discuss friction and do a few minor friction experiments by rubbing our hands together and rubbing sand paper together against wood.
The left side of the page is divided into observations in words and drawings of five things we noticed that occur with friction: it involves things rubbing together, heat is usually eventually created, it generates some amount of sound or noise, it can cause things to wear away, and eventually causes things to slow down and/or stop.
The right side of the page shows an approximation drawing of the matchbox car that each kid select, with labels around the edge that say things like sticky tack, pipe cleaner, tape strip, wooden block, elastic, paper clip… as they all get the same supplies to add to their card to create friction. Once they have designed their modified car, they draw those materials in the placement on the vehicle and then have to develop a hypothesis about why they use the materials in the way they did before they’re allowed to race down the track; after the first trial, noting what worked and what didn’t work to slow their car down, they go back and modify the car again, and again, and again, always trying to get the slowest possible vehicle.
An example of one match box car modified to hopefully increase friction on the track. It is a red race car adorned with blue sticky tack to hold things on…that has some popsicle sticks sticking off of it, and a paper clip on top, and a big pipe cleaner design sticking up off the roof with an elastic position so that it drags behind on the track.
A view from the top of the track looking down the long hill. It’s a matchbox car race, track, shooting off of one of my tall, rolling bookshelves, and travelling over several chairs stacked with books to create braces to hold the track in place with different angles and hills, with all the braces getting shorter as you get towards the bottom. It is ready to test cars that have been modified to increase their friction and will hopefully not even make it to the bottom of the track.
A picture of a lineup of kids waiting to test their friction race car on the track with the kid at the front of the line whose car is stopped about 6 cm from the top – so very successfully achieving massive increases in friction.
Note: I never put pictures of children’s faces or use their names online, so the pictures have been altered to have smiley face, etc. emojis over top of them. This group is also dressed in PJs because it was a pyjama day spirit day.
I do this stellar #STEM / #STEAM activity at least once per yr, Gr2 class, force & motion sci…
Friction racecar lab:
Kids get so psyched trying to modify & re-modify matchbox cars with supplied junk to incr friction and go slow as possible down a hot wheels track—feverish #PlayLearning.
So fun!
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