Exercice 1: On con sidère le système {corps C; fil OA} :
1) Représenter la force F exercée par le fil OA sur le corps C;
2) Représenter la force T exercée par le support sur le fil OA ;
3) représenter la force R exercée par le plan incliné sur le corps C;
4-) Représenter le poids : P du corps C;
5) Mettre une croix (X) dans la case correspondante :
Force de
contact
localisée
Force de
contact
répartir
Force à
distance
Force
intérieure
1 LIRITA

hi i’m sorry to call us today so we will get back with y’all and we will have to do it haha omg was the day

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.

i really dont know but i will try okay.

so i think u would just add all them up and get your answer..