ball and the wall.ipynb

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   "source": [
    "from vpython import *\n",
    "ball = sphere(pos=vector(0,0,0), radius=0.5, color=color.red)\n",
    "wallR = box(pos=vector(6,0,0), size=vector(0.2,12,12), color=color.green)\n",
    "wallL = box(pos=vector(-6,0,0), size=vector(0.2,12,12), color=color.green)\n",
    "ball.velocity = vector(25,0,0)\n",
    "ball_return = ball.velocity.x\n",
    "deltat = 0.005\n",
    "t = 0\n",
    "ball.pos = ball.pos + ball.velocity*deltat \n",
    "while t < 10:\n",
    "    rate(50)\n",
    "    if ball.pos.x > wallR.pos.x:\n",
    "        ball.velocity.x = -ball.velocity.x\n",
    "    elif(ball.pos.x < wallL.pos.x):\n",
    "        ball.velocity.x = ball_return\n",
    "    ball.pos = ball.pos + ball.velocity*deltat \n",
    "    t = t + deltat "
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