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Physics (AS & A Level) · Oct / Nov 2023 · Paper 13 · Question 15

9702Energy conservation

A wooden cylinder floats partially submerged in a bath of water. A force F is applied to the cylinder until it is just fully submerged. Which statement is not correct?

  1. ASome of the water gains gravitational potential energy.
  2. BThe cylinder loses gravitational potential energy.
  3. CWork is done by force F on the cylinder.
  4. DWork is done by the upthrust on the cylinder.

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Correct answer: D. Work is done by the upthrust on the cylinder.

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