Sagot :
Bonjour,
1) v = 30,0 m.s⁻¹
1 km = 1000 m et 1 h = 3600 s
donc v = 30,0 x 3600/1000 = 30,0 x 3,6 = 108 km.h⁻¹
2) v = 40 x 10³ km.h⁻¹ = 40000 km.h⁻¹
v = 40000 x 1000/3600 = 40000/3,6 ≈ 11 111 m.s⁻¹
Bonjour,
1) v = 30,0 m.s⁻¹
1 km = 1000 m et 1 h = 3600 s
donc v = 30,0 x 3600/1000 = 30,0 x 3,6 = 108 km.h⁻¹
2) v = 40 x 10³ km.h⁻¹ = 40000 km.h⁻¹
v = 40000 x 1000/3600 = 40000/3,6 ≈ 11 111 m.s⁻¹