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Physics, 05.12.2020 17:30 kingken3400
Activități de învățare și autoevaluare
1) În figura III.18 sunt reprezentate punctele cardinale, vitezele a trei
mobile și scara folosită (unui segment îi corespunde o viteză de 10 km/h).
Precizează caracteristicile vitezelor v2 și v3 ghidându-te după exemplul
dat pentru vị. (Exemplu: vị are direcția Nord-Sud, sensul spre Sud și mărimea de
10 km/h.)
2) Mai multe vehicule se deplasează pe şoseaua orizontală indicată în
figura III.19. Ele au vitezele: vị = 5 m/s spre A, v2 = 18 km/h spre B, v3 = 54
km/h spre A v4 = 20 m/s spre A și vs = 72 km/h spre B.
a) Transformă toate vitezele în m/s.
N
V3
V2
E
V
Fig. III.18
B
Fig. III.19
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