Which of the following is a scalar quantity? ☐ A displacement ☐ B moment of a force ☐ C power ☐ D weight (Total for Question 1 = 1 mark) - Edexcel - A-Level Physics - Question 1 - 2023 - Paper 1

A scalar quantity is a physical quantity that has only magnitude and no direction. Among the options given:

• Displacement is a vector quantity because it has both magnitude and direction.
• Moment of a force is also a vector quantity, representing the rotational effect of a force.
• Power is a scalar quantity since it measures the rate of doing work, without direction.
• Weight is a vector quantity representing the force of gravity acting on an object, with both magnitude and direction.

Thus, the correct answer to the question is C power, as it is the only scalar quantity listed.