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Physics (AS & A Level) · May / June 2021 · Paper 11 · Question 3

9702Scalars and vectors

A force of 10 N and a force of 5 N act on an object. The angle between the forces is 150°. The resultant force on the object can be resolved into a pair of perpendicular components. Which row shows numerical expressions for a possible pair of perpendicular components?

  1. A10 cos 30° – 5 | 10 cos 30°
  2. B10 sin 30° – 5 | 10 cos 30°
  3. C10 – 5 cos 30° | 5 sin 30°
  4. D10 – 5 sin 30° | 5 cos 30°

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Correct answer: C. 10 – 5 cos 30° | 5 sin 30°

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