First slide

Static friction

Question

If the normal force is doubled and limiting frictional force is maintained at the same value, the coefficient of friction

Moderate

A

remains uncharged
B

becomes halved
C

gets doubled
D

gets quadrupled

Solution

f _l = µ_s . N

Then µ^'s = $f'_{l}$ / N^' = $f_{l}$ / 2N = µ_s /2.

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