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Brilliant! The ball starts from a y co-ordinate of \(10\) and then falls to the ground, which has a y co-ordinate of \(0\). So, the displacement is \(0-10 = -10\)
It is very important to remember that displacement means you must calculate \(\text{Final position}\) \(- \text{Initial Position}\). Many students calculate \(\text{Initial Position}\) \(- \text{Final position}\) and get the opposite sign.
What is the displacement of the ball in the case of this animation? Assume the ball is initially dropped from \(y=10\)
  • \(10\)
  • \(-10\)
  • \(0\)
  • \(20\)