🔍 Key Concepts

• Mechanical potential energy vs. heat energy vs. power • Common engineering units that measure energy (not power or heat flow) • Relationship between work and energy: both measured in the same units

💭 Think About

• Which of these choices is a unit that describes an amount of work done in lifting or moving something mechanically? • Which option is actually a measure of power (rate of doing work), not energy itself? • Which options are more commonly associated with heat or thermal energy instead of mechanical work?

✅ Before You Answer

• Identify which options are energy units and which are power or heat units • Recall that mechanical energy and mechanical work share the same unit • Eliminate any answer that measures a rate (energy per time) rather than a total amount of energy