Question

Prosze o rozwiązanie tylko zadania 3

Answer 1

A)

W dzień - 40 s

W nocy - 1 minuta

b)

Dane:

noc

t = 1 min = 60 s
s = 1 km = 1000 m
v = ? [m/s]

v = s/t

v = 1000/60 m/s

v = 16,7 m/s

v = 16,7 * 3,6 km/h

v = 60 km/h

dzień

Dane:

s = 1km = 1000 m
t = 80 s
v = ? [m/s]

v= s/t

v = 1000/80 m/s

v = 12,5 m/s

v = 12,5 * 3,6 km/h

v = 45 km/h

c)

Dane:

v = 60 km/h
s = 15 km
t = ? [h]

t = s/v

[t] = [km : km/h = km* h/km = h]

t = 15/60 h

t = 0,25 h