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Physics (AS & A Level) · May / June 2025 · Paper 13 · Question 8

9702Non-uniform motion

Two spheres are released from rest at equal heights above the ground. Both spheres reach terminal velocity. One sphere has a larger density than the other sphere. Both spheres have equal volumes. Which statement is correct while both spheres are at terminal velocity?

  1. AThe drag forces on the spheres are equal.
  2. BThe resultant forces on the spheres are equal.
  3. CThe velocities of the spheres are equal.
  4. DThe weights of the spheres are equal.

As printed in the paper

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Correct answer: B. The resultant forces on the spheres are equal.

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