Question

A aceleração de uma partícula em um escoamento em regime permanente não é necessariamente igual a zero. Mesmo em regime permanente, a partícula pode estar submetida a uma aceleração convectiva, que ocorre devido a geometria do seu escoamento. Baseando-se na formula da velocidade: stack a subscript p with rightwards arrow on top equals fraction numerator D V with rightwards arrow on top over denominator D t end fraction equals u fraction numerator partial differential V with rightwards arrow on top over denominator partial differential x end fraction plus v fraction numerator partial differential V with rightwards arrow on top over denominator partial differential y end fraction plus w fraction numerator partial differential V with rightwards arrow on top over denominator partial differential z end fraction plus fraction numerator partial differential V with rightwards arrow on top over denominator partial differential t end fraction Julgue os itens abaixo. I - fraction numerator partial differential V with rightwards arrow on top over denominator partial differential t end fraction space minus space R e p r e s e n t a space a space a c e l e r a ç ã o space t o t a l space d a space p a r t i c u l a. II - fraction numerator D V with rightwards arrow on top over denominator D t end fraction minus space D e t e r m i n a space a space a c e l e r a ç ã o space l o c a l. space III - u fraction numerator partial differential V with rightwards arrow on top over denominator partial differential x end fraction plus v fraction numerator partial differential V with rightwards arrow on top over denominator partial differential y end fraction plus w fraction numerator partial differential V with rightwards arrow on top over denominator partial differential z end fraction space minus space r e p r e s e n t a space a space a c e l e r a ç ã o space c o n v e c t i v a. Assinale a alternativa que apresenta apenas as proposições corretas. Escolha uma:
a. I, II e III.
b. I e II.
c. III. Correto
d. II e III.
e. I e III.

RESPOSTA CERTA : c. III.

Answer 1

Resposta correta: III 

Answer 2

A resposta é III, corrigido no AVA.