Viteza de aterizare a unui avion este de 45 m/s iar timpul deplasarii pe pista aerodromului este egal cu 30 s

Daca acceleratia este zero atunci aplicam ecuatia miscarii rectilinii uniforme (viteza constanta)
si obtinem o lungime a pistei de


Daca acceleratia este diferita de zero (atunci cand avionul franeaza) aplicam ecuatia miscarii rectilinii uniform variate (acceleratie constanta)

(inceputul pistei)

(avionul franeaza) -> trebuie sa ii cunoastem valoarea
In acest caz avem o ecuatie de gradul 2 in timpul  pe care trebuie sa o rezolvam ca sa aflam timpul.

answer and explanation;

composition refers to both the types of minerals within a rock and the overall chemical makeup of the rock while texture refers to the size and arrangement of the minerals or grains that make up a rock. both composition and texture can be used to classify rocks, such as igneous rocks. texture describes how the rock became solid or crystallized from liquid, melted rock. composition of a rock describes the minerals that make up a particular rock.