Mark the correct statements about the friction between two bodies

Options

A. Static friction is always greater than the kinetic friction.
B. Coefficient of static friction is always greater than the coefficient of kinetic friction.
C. Limiting friction is always greater than the kinetic friction
D. Limiting friction is never less than the static friction.

Answer

A

Explanation

Static firction may be greater than or less than kinetic friction.
(i) `mu_(s) = 0.5 , mu_(k) = 0.4`
`f_(max) = f_(lim) = mu_(s) mg = 0.5 xx 10 xx 10 = 50 N`
(ii) Static friction `= 45 N`