Question

Allison is trying to make her new 72.3 kg St. Bernard go out the back door, but the dog refuses to walk. If the coefficient of kinetic friction between the dog and the floor is 0.512, how hard must Allison push to move the dog with a constant speed?

Answer 1

Try:
F = u N

u is the coeff. of friction
N is the normal force (the floor will counteract the weight of the dog)
You are looking for F.

Answer 2

I got 362.7?

Answer 3

Sounds good !