Which of the following is NOT an example of a simple machine?
  1. Arobot
  2. Apulley
  3. Alever
  4. Ascrew
Explanation
Answer: A - A robot is not an example of a simple machine. A simple machine is the simplest mechanism that changes the direction or magnitude of a force. A robot is too complex to be a simple machine since it employs several types of machinery.
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