Vector Addition Using Head-to-Tail Method

Steps:

• Identify the starting point as the tail of vector P.
• Place the tail of vector Q at the head of vector P.
• Draw the resultant vector from the tail of P to the head of Q.
• Verify the diagram matches this configuration for P + Q.

Why A is correct:

• It depicts the head-to-tail addition, where the resultant connects P's tail to Q's head, per the triangle law of vector addition.

Why the others are wrong:

• B shows tail-to-tail placement, representing parallelogram addition incorrectly for the resultant.
• C illustrates P - Q by reversing Q's direction.
• D combines vectors from the same origin without proper displacement.

Final answer: A