AP Physics 1 Question 187: Answer and Explanation
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7. An object travels along the vector d1 = 4m î + 5m ĵ and then along the vector d2 = 2m î - 3m ĵ. How far is the object from where it started?
- A. 6.3 m
- B. 8 m
- C. 10 m
- D. 14 m
Correct Answer: A
If the object travels along the vectors d1 and then d2, then the total distance travelled with be the sum of the two vectors d1 + d2:
The total distance of the object from the starting position is therefore the magnitude d1 + d2: