Resposta :
1° trecho: AB
delta s = 100 m
v = 25 m/s
v = delta s / delta t
25 = 100/delta t
delta t = 4s
2° trecho: BC
delta s = 260 m
v = 52 m/s
v = delta s / delta t
52 = 260/delta t
delta t = 5 s
Trecho total:
VM = delta s total / delta t total
VM = 360/9
VM = 40 m/s
delta s = 100 m
v = 25 m/s
v = delta s / delta t
25 = 100/delta t
delta t = 4s
2° trecho: BC
delta s = 260 m
v = 52 m/s
v = delta s / delta t
52 = 260/delta t
delta t = 5 s
Trecho total:
VM = delta s total / delta t total
VM = 360/9
VM = 40 m/s