f = open(tetxfile, 'r')
buffer = f.read()
f.close()

table = [map(int, row.split()) for row in buffer.strip().split("\n")]

import numpy as np
g = 9.81

for i in range (Pingpong2[-1]):
    for k in range(Pingpong2[0][-1]):
        if i == 0:
            dv = Pingpong2[3][i]
            dt = Pingpong2[0][i]
        else:
            dv = Pingpong2[3][i] - Pingpong2[3][i-1]
            dt = Pingpong2[0][i]-Pingpong[0][i-1]

        a = dv/dt
        a = g*np.sin(alpha)/(1+c)