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FCAT Grade 8 Science Assessment Practice Questions

Category - FCAT Science Assessment Grade 8

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Sally is playing on a merry-go-round, a circular device that spins you round and round. If Sally moves from the edge of the merry go-round to the middle, the merry go-round will:
  1. Spin slower.
  2. Stop.
  3. Spin faster.
  4. Begin to decelerate.
  5. Lift off the ground.
Explanation
Answer: C - The merry-go-round will spin faster. Due to the concept of inertia, a body spinning near the edge requires more energy than a body spinning closer to the center of the spinning object. Thus, as Sally moves closer to the middle, energy must be conserved, resulting in a faster overall spin.
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