We used a car and a ramp to create a fair test for friction. We found out that plastic is smooth so has a low amount of friction and sandpaper is rough and bumpy so has a high amount of friction.
ggg
We used a car and a ramp to create a fair test for friction. We found out that plastic is smooth so has a low amount of friction and sandpaper is rough and bumpy so has a high amount of friction.
ggg