Question

m=2k Ft =3,92N Ff=? Ffsupra N=?​

Answer 1

Răspuns:

Formula pt Ff=u(coeficientul de frecare) x N(normala)

N=m × g= 2k×10=20k

Ft=m × a =2k × a -> a=3,92N / 2k =1,96k

deci Ff=20k × u

si Ff/N = 20k × u / 20k = u