Question

The concept of energy can be calculated in multiple ways. Which units are used for energy? Check all that apply.

joules
kilogram meters2/seconds2
newtons
kilojoules
meters/seconds2

Answer 1

Correct choices:
- joules ✓
- kilogram meters2/seconds2 ✓
- kilojoules ✓

Incorrect:
- newtons ✗ (unit of force: 1 N = kg·m/s^2)
- meters/seconds2 ✗ (unit of acceleration)

Explanation: 1 joule = 1 kg·m^2/s^2, and a kilojoule = 1000 joules.