For a particular block pressed against a vertical wall

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

For a particular block pressed against a vertical wall, the least horizontal force required to prevent it from sliding down is

F_1

when the coefficient of static friction is

\mu_s

. If the coefficient of static friction is doubled, the new least horizontal force

F_2

will be (a)

\displaystyle \frac{F_1}{\sqrt{2}}

(b)

2F_1

(c)

F_1

(d)

\displaystyle \frac{F_1}{2}