Vpython

http://vpython.org

from visual import *

ball = sphere(pos=(-5,0,0), radius=0.5, color=color.cyan)

wallR = box(pos=(5,0,0), size=(0.2,12,12), color=color.green)

ball.velocity = vector(25,0,0)

deltat = 0.005

t = 0

for  index in range(1,100):

    rate(100)

    if ball.pos.x > wallR.pos.x:

        ball.velocity.x = -ball.velocity.x

    ball.pos = ball.pos + ball.velocity*deltat

    print ball.pos

    t = t + deltat