wheres the audio also buenas noches means good night
You just have to put what you think on how much time you spend on the TV and stuff like for sleeping be like 300 min or 420 minutes you know,, and for homework you would be like 180 minutes
It was for the process of producing steel. it make making steel easier. hope this helps:)
The net force on the bookcase in the direction of its motion is
∑ F = 65 N - F[friction] = (41 kg) (0.12 m/s²)
so that friction has a magnitude of
F[friction] = 65 N - (41 kg) (0.12 m/s²) = 60.08 N
The net force on the bookcase perpendicular to the surface is
∑ F = F[normal] - (41 kg) g = 0
so that
F[normal] = (41 kg) g = 401.8 N
If µ is the coefficient of kinetic friction, then
F[friction] = µ F[normal]
so that
µ = F[friction] / F[normal] = (60.08 N) / (401.8 N) ≈ 0.15
