Can you pls help as Im at a complete loss....

My son in Bkk has been given homework.

He has to design and then make s toy based on friction and im at a loss but want to help...

Not too technical pls as he is only 8 years old.

Thank you

https://www.google.com/search?q=science+toys+friction+demonstration+kids&hl=en&pws=0

Take a remote control car, put it on a high friction surface such as wood floor, run it and slam on the brakes. Do the same thing but the car is on a wet plate of glass or oil.

//edit - on the other hand, a ceramic tile floor would be safer for the test. I know when our ceramic tiles get wet just stepping on a few drops of water can send you in a spin.

here you are

at your username and the subject matter.

Like Tommo says (I haven't watched the video) do a rubber band powered car demonstrate the difference between having rubber on the wheels and not. With rubber on the wheels it should go a lot further.

Or even more simple but probably less marks simply a bike brake.

Thanks so far for your replies...just to add it needsto be something he can take in to the classroom....thanks

Thanks so far for your replies...just to add it needsto be something he can take in to the classroom....thanks

surely with a monikor like "slippery when wet"....sure you will think of something LOL

simple one.....cube of wood on a string.... spring balance between in between string and block to measure amount of force...couple of different materials to pull it along...ie piece of glass, piece of sandpaper...etc measure the amount of force required to move the block...easy and cheap...

Just put something on a sloping glass plate. Add water. Watch it slide. Slippery when wet.

Edited June 29, 201313 yr by harrry

I see one time on TV when they put two book together

one page, one book, one page other book

do this many times

child will think easy for pull away ... but can not

easy fore child because everyone has school book

more fun is to make one at home with two books with many pages

take to school and ask two child from class to try and pull apart

if you do this good, your son will be hero ... sure 100%

because every child who watch will think sure, pull apart easy

but can not ... majic of friction

^^ That rings a bell.

.