The force required to drag several objects across a floor was measured. Calculate the µK for these objects.

Block Weight Friction µK

A 150 lb 30 lb

B 20.0 N 5.0 N

C 1,500 lb 60 lb

(NOTE: I don't want want you to just give me the answer, I want to know how to work it.)

Explanation:

Case-A

Block weight

Friction Force

and friction force is

where N=normal reaction (Usually equals to weight)

Case-B

Block weight

Friction Force

Case-C

Block weight

Friction Force

ι вєℓιєνє ιт ιѕ тнє fιяѕт ¢нσι¢є(α.)

нє ѕнσυℓ∂ ѕмιℓє ρσℓιтℓу αи∂ ѕρєαк тσ тнє ρєяѕσи ωнσ ιѕ ιитєяяυριиg αfтєя тнє ∂ιѕ¢υѕѕισи

нσρє ι ¢συℓ∂ нєℓρ.