Consider Newton’s second law which states that force=mass x acceleration. Note this is very similar to the equation for momentum, momentum = mass x velocity. Acceleration is simply increasing speed and velocity is simply speed with direction. You watched as each of the balls accelerate down the track toward the solo-cup. Why does it take longer for the solo cup to stop the golf ball as opposed to the ping-pong ball or the marble? Discuss force, mass and acceleration. Note: use data table 1 (speed) for a rough estimate acceleration