Question

Two vectors $\vec{A}$ and $\vec{B}$ inclined at an angle $\theta$ have a resultant $\vec{R}$ which makes an angle $\alpha$ with $\vec{A}$ . If the directions of $\vec{A}$ and $\vec{B}$ are interchanged, the resultant will have the same

• A. direction
• B. magnitude
• C. direction as well as magnitude
• D. none of these

Answer 1

Answer: (B)

Neither the magnitude of vectors nor the angle between the vectors is changed. So, magnitude of the resultant remains unchanged. However, the direction of the resultant will be changed.