Post a New Question

physics

posted by .

A dock worker loading crates on a ship finds
that a 25 kg crate, initially at rest on a hori-
zontal surface, requires a 90 N horizontal force
to set it in motion. However, after the crate
is in motion, a horizontal force of 51 N is
required to keep it moving with a constant
speed.
The acceleration of gravity is 9.8 m/s2 .
Find the coefficient of static friction be-
tween crate and floor.

  • physics -

    90 N = M * g * mu_s

    Solve for the static friction coefficient, mu_s

    M = 25 kg
    g = 9.8 m/s^2

    The 51 N force can be used to compute the kinetic friction coefficient, but they didn't ask for that.

Answer This Question

First Name
School Subject
Your Answer

Related Questions

More Related Questions

Post a New Question