Work-Energy Theorem

W_{n e t} = Δ K E = \frac{1}{2} m v_{f}^{2} - \frac{1}{2} m v_{i}^{2}

Net work equals the change in kinetic energy.

Variables

W_net

Net work

Total work done

J

ΔKE

Change in KE

Final minus initial KE

J

m

Mass

Object mass

kg

v_f

Final velocity

Final speed

m/s

v_i

Initial velocity

Initial speed

m/s

Derivation

Integrate F = ma over displacement.

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