Which of the following quantities is not an example of force?

Analyze the question: We need the one quantity that is not a force.

Concept: A force is a push or a pull that can change the shape, speed, or direction of a body. It is a vector quantity measured in newtons (N). Mass, on the other hand, is the amount of matter in a body. It is a scalar quantity measured in kilograms (kg).

Check each option:

• A. Mass: This is the quantity of matter in an object, measured in kg. It is not a push or a pull, so it is not a force.
• B. Tension: This is the pulling force transmitted along a string, rope, or cable. It is a force.
• C. Weight: This is the gravitational force acting on a body, W = mg. It is measured in newtons, so it is a force.
• D. Friction: This is the force that opposes relative motion between two surfaces in contact. It is a force.

Answer: Mass is the only quantity here that is not a force.

Tip: Students often confuse mass and weight. Remember that mass is measured in kg and stays the same everywhere, while weight is measured in N and changes with gravity (W = mg). If the unit is the newton, it is a force.