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FCAT Grade 8 Science Assessment Practice Questions

Category - FCAT Science Assessment Grade 8

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Which of the following actions does not involve work being done on an object?
  1. A person lifting a suitcase.
  2. A soccer ball flying through the air.
  3. A forklift moving a stack of boxes.
  4. A person running.
  5. A person pushing on a gas pedal.
Explanation
Answer: B - Work is defined as a force applied across a distance, meaning the force needs to be in contact with the object. In the case of a soccer ball flying through the air, there is no force applied to the ball, other than gravitational force, which is not considered work being done. The other examples all have a force (person, forklift) doing work on an object.
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