AP Physics 1 Question 189: Answer and Explanation
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9. The x-component of vector A is -42, and the angle it makes with the positive x-direction is 130°. What is the y-component of vector A ?
- A. -65.3
- B. -50.1
- C. 50.1
- D. 65.3
Correct Answer: C
The x-component of vector A can be used to calculate the magnitude of A:
The y-component can then be calculated:
which corresponds to (C).