A simple problem of practical importance that illustrates the
nature of friction is the study of the initiation of motion of an
object on a rough surface. For the purpose of this example, let’s
look at what happens when a person pushes a crate of mass m on a
rough floor as shown in Figure 2. Letting μs and μk, with μk <
μs, be the static and kinetic friction coefficients between the
crate and the ground, respectively, consider a case in which the
force P(t) = Pot. For this case, determine the time at which the
motion begins and the friction force as a function of time.
A Simple Problem Of Practical Importance That Illustrates The Nature Of Friction Is The Study Of The Initiation Of Motio 1 (11.52 KiB) Viewed 26 times
-H₂. Hk Figure 2: A person pushing a crate of mass m over a rough surface with a time-dependent force P(t)
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