Question Detail
Question
A body moves in an x-y plane with velocity v m/s. The components of v are v_x = 5 m/s and v_y = 7 m/s. What is the magnitude of the velocity?
Correct Answer
Option B is the correct answer.
Detailed Explanation
The magnitude of velocity is given by v = √(v_x² + v_y²) = √(5² + 7²) = √(25 + 49) = √74 = 8.6 m/s.
Hint
Use the Pythagorean theorem: v = √(v_x² + v_y²).