AP Physics C: Mechanics / Unit 3: Work, Energy, and Power
3.1 Translational Kinetic Energy
Notes
$$K=\frac{1}{2}mv^2$$
- Energy is a scalar, measured in joules (J).
Practice
A 2 kg ball moves at 3 m/s. Its KE:
$\displaystyle \frac{1}{2}(2)(9)$.
Doubling speed makes KE:
Squared.
Kinetic energy can never be:
Mass and $v^2$ are positive.
Ready for more? Take the Unit 3 test.