Vector Subtraction via Addition of Negative

Steps:

• Define V as P + (-R), where -R reverses the direction of R while keeping magnitude.
• Draw P starting from origin.
• Attach -R head-to-tail to P's head.
• Draw V from origin to -R's head, forming the triangle.

Why A is correct:

• Diagram A depicts head-to-tail addition of P and -R, matching the parallelogram law for V = P - R.

Why the others are wrong:

• B shows P + R, adding instead of subtracting R.
• C illustrates R - P, reversing the operation.
• D misaligns vectors, ignoring coplanar head-to-tail rule.

Final answer: A