A particle moves in the xy-plane with a position vector r = 3i + 4j. Calculate the magnitude of its displacement from the origin.
Q1. A particle moves in the xy-plane with a position vector r = 3i + 4j. Calculate the magnitude of its displacement from the origin.
Answer: 5 units
Explanation: The magnitude is the square root of (3 squared plus 4 squared), totaling 5. Option B is incorrect as it simply adds the scalar components.