The relationship between surface roughness and frictional force
Aim:
To test the effect of surface roughness on the force required to move a
weighted sled (analogous to frictional force)
Hypothesis:
The rougher the surface the larger the frictional force.
Equipment:
Sand paper of varying roughness P40P400
Clipboard
Rectangular plastic takeaway container
with a hole in one end and a string
attached
Something to lean the
clipboard on to make a
ramp
Newton Meter
500g mass