24.
Δl = 1.1m - 1m = 0.1m
F = k×Δl => k = F/Δl
k = 1000N/0.1m = 10 000 N/m
15.
d = m/V => V = m/d
V = 10kg/(1kg/m³) = 10 m³
11.
v = d/t => d = v×t
d = 30km/h×2h = 60 km
6.
a = (v₂ - v₁)/t
= (10m/s - 6m/s)/2s
= (4m/s)/2s
= 2m/s²
3.
x = Snagov - Bucuresti
y = Bucuresti - Sinaia
d = x + y
v = d/t => d = v×t
30km + y = 70km/h×2h
30km + y = 140km
y = 140km - 30km
y = 110 km ( Bucuresti - Sinaia )
19.
F = m×a => a = F/m
a = 10000N/3kg
= 3333.(3) m/s²
1 N = 1kg·m/s²
