Vectors vs. Scalars in Physics

Steps:

• Define vectors as quantities with magnitude and direction; scalars as those with only magnitude.
• Evaluate each option against this definition.
• Identify force as having both magnitude and direction.
• Confirm others lack direction.

Why B is correct:

• Force is a vector quantity, as defined in Newton's second law (F = ma), requiring both magnitude and direction for complete description.

Why the others are wrong:

• A. Speed is a scalar, measuring only magnitude of motion without direction.
• C. Mass is a scalar, representing amount of matter without direction.
• D. Distance is a scalar, the total path length traveled without direction.

Final answer: B