Gravity calculator

velocitys = [0,1.7155,2.426,2.97,3.43]
distances = [0,0.15,0.3,0.45,0.6]
mean = 0
total = 0
for i in range(0,4):
    for j in range(i,5):
        if (distances[i]!=distances[j]):
            total += 1
            print(i,"compared to",j)
            temp = (velocitys[j]**2 - velocitys[i]**2)/ (2*(distances[j]-distances[i]))
            mean += temp
            print(temp)

print("from ",total,"results the mean of graity is ",mean/total)