formule la lab. 5 drumuri auto

R f

m /s2

R f

Ri

i1

Rw

vmed1 = 20

10,94 = 1,82 s 1,822

vmed2 = 20

3,77 = 5,30 s 5,302

vmed3 = 20

4,95 = 4,04 s 4,042

vmed4 = 20

3,03 = 6,60 s 6,602

vmed5 = 202,0 = 10 s 102

vmed = St ;V n+1

a i= V n+1−V n

t ;

Rw=Ca∗F∗v2

a i1= 1,82−010,94

= 0,166 m/s

a i2= 5,30−1,82

3,77 = 0,923 m/s

a i3= 4,04−5,30

4,95 = 0,254 m/s

a i4= 6,60−4,04

3,03 = 0,844 m/s

a i5= 10−6,60

2 = 1,7 m/s

R j=m∗ai∗δcor Pt= Pf ± Pi±P j± Pw;

U c2

R j1

R j2

R j3

R j4R j5

NS2/m2

v=v autom¿

−vvînt ¿

v=v autom¿

+vvînt ¿

Rw

Rw 1

Rw 2

Rw 3

Rw 4

Rw 5

0 = Rw+R j−Ri+R f

Ri=Rw+R j+R f

Ri1=2,01 + 252,917 + 293 = 547,927

Ri2 = 17,02 + 1406,282 +293 = 1716,302

Ri3 = 9,89 + 396,994 + 293 = 699,884

Ri4 = 26,39 + 1346,862 + 293 = 1666,252

Ri5 = 60,6 + 2590,12 + 293 = 2943,72

Pi= 0

i i¿ = Ri/ G

ii1¿ = 547,927 / 14650 = 0,037

ii2¿ = 1716,302/ 14650 = 0,117

ii3¿ = 699,884 / 14650 = 0,047

ii4¿ = 1666,252 / 14650 = 0,113

ii5¿ = 2943,72/ 14650 = 0,201

h = i l¿∗b=ii

¿∗S

h1 = 0,037 * 20 = 0,74

h2 = 0,117 * 20 = 2,34

h3 = 0,047 * 20 = 0,94

h4 = 0,113 * 20 = 2,26

h5 = 0,201 * 20 = 4,02

V med= f(S); a1= f(S); Ri= f(S)

il