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CODING SOAL A

import numpy as np

from math import *

g = 9.81

m1 = eval(input("Massa benda 1= "))

m2 = eval(input("Massa benda 2= "))

m3 = eval(input("Massa benda 3= "))

u = eval(input("Koefisien gesekan = "))

alpha = eval(input("Sudut yang diketahui = ")) #ubah derajat menjadi radian

v = sin(alpha)

w = cos(alpha)

A = np.array([[1, 0, 0], [-1, 1, 0], [0, -1, 1]], dtype='float')

b = np.array([(m1*g*(v-(u*w)), m2*g*(v-(u*w)), m3*g*(v-(u*w)))])

n = len(b) for k in range(0,n-1):

 for i in range (k+1,n):
   if a[i,k] != 0.0:
     lam = a[i,k]/a[k,k]
     a[i,k+1:n] = a[i,k+1:n]-lam*a[k,k+1:n]
     b[i] = b[i] - lam*b[k]

for k in range(n-1,-1,-1):

 b[k] = (b[k] - np.dot(A[k,k+1:n],b[k+1:n]))/A[k,k]

print(list(b[k]))