Kinetic Energy in Simple Harmonic Motion- This is an account of the velocity of the particle. K = 1/2 mv<sub>2</sub> = 1/2mA<sup>2</sup>ω<sup>2</sup> cos<sup>2</sup> (ωt + Φ) = 1/2 mω<sup>2</sup> (A<sup>2</sup> #8211; x<sup>2</sup>)