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Friction quiz
Five questions on Friction. Answer all 5 to see your score. Questions are drawn from a bank of 15, so every attempt is different.
Question 1 of 5
Who refined the laws of dry friction in 1781?
Question 2 of 5
At impending motion, static friction equals:
Question 3 of 5
Why is it harder to start a crate moving than to keep it moving?
Question 4 of 5
Dry friction is roughly independent of:
Question 5 of 5
A block on an incline with mu_s = 0.5 starts to slip at about: