Question

10 what must the unit of kinetic energy represent since it is a scalar quantity?

• direction only
• amount of force
• magnitude only
• magnitude and direction

Explanation:

Scalar quantities, by definition, are physical quantities that only have a magnitude (numerical value) and no associated direction. Kinetic energy is a scalar, so its unit represents magnitude only. The other options are incorrect: direction only does not describe scalars, amount of force relates to a vector quantity (force), and magnitude and direction describes vector quantities.

Answer:

magnitude only