Finding the friction coefficient
Answers are for parents and teachers.
1
N = 10 N, F = 3 N. μ?
0.3
2
μ = 0.25, N = 20 N. F (N)?
5
3
With an adult, tilt a board slowly with a book on it and see at what tilt the book starts to slide.
The answer depends on the surfaces.
4
Why note in a lab conclusion that μ has no unit?
Because μ is a ratio of two forces, so the units cancel.
5
If your result differs from another group’s, what could the reason be?
Surface condition, dynamometer accuracy, uneven pulling.