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Physics (AS & A Level) · May / June 2021 · Paper 11 · Question 18

9702Energy conservation

An object of weight 15.0 N is pulled along a horizontal surface at a constant velocity of 2.00 m s⁻¹. The force pulling the object is 12.0 N at 30.0° to the horizontal, as shown. What is the power used to move the object?

  1. A12.0 W
  2. B20.8 W
  3. C24.0 W
  4. D30.0 W

As printed in the paper

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Correct answer: B. 20.8 W

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