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Příklady

t = 2,5h
s = 180km
V_p = s/t
V_p = 180/2,5 km/h
V_p = 72 km/h
3/4t = t1
v_1 = 90km/h
1/4t = t2
v_2 = 50km/h
v_p = ?
v_p = s/t = (v_1 * t_1 + v_2 * t_2)/(t_1 + t_2)
v_p = (90 * 3/4t + 50 * 1/4t)/t = t((90*3)/4 + 50/4)/t = 320/4 = 80km/h
s_1 = 3/4s
s_2 = 1/4s
v_1 = 90km/h
v_2 = 50km/h
v_p = ?
v_p = s/t = (s_1 + s_2)/t = (3/4s + 1/4s)/3/4 *v2 + 1/4 * v_1/v_1v_2 = s*v_1*v_2/s(3/4v_2 + 1/4v_1) = v1 * v2/(3/4v_2+ 1/4v_1) = 90 * 50/(¾ * 50 + ¼ * 90) = 90 * 50 * 4/ 150 + 90 = 75km/h
t = s/v
t_1 = 2h
v_1 = 6km/h
v_2 = 3km/h
t_2 = 1h
v_p = s/t = t1 * v1 + t2 * v2/t = 12 + 3/3 = 5