Ep = m × g × h
g ≈ 10 [tex]\frac{m}{s^2}[/tex]
1. Ep = 20J m = 10kg
h = [tex]\frac{Ep}{mg}[/tex]
h = [tex]\frac{20}{10 x 10}[/tex] = [tex]\frac{20}{100}[/tex] = 0,2[m]
2. m = 20kg h = 5m
Ep = mgh
Ep = 20 × 10 × 5 = 1000[J]
3. Ep = 50J h = 20m
m = [tex]\frac{Ep}{gh}[/tex]
m = [tex]\frac{50}{10 x 20}[/tex] = [tex]\frac{50}{200}[/tex] = 0,25[kg]
Mam nadzieję, że pomogłam :)
