Concept Map & Summary of the Chapter

Last updated at September 16, 2026 by

A quick map of how the big ideas of this chapter connect together.
Work, Energy & Simple Machines
work transfers energy
Work & Energy
7.1 – 7.5
Simple Machines
7.6 — MA = Load / Effort
Work
W = F × s, unit joule (J)
Kinetic & Potential energy
K = ½mv², U = mgh
Pulley
MA = 1, changes direction only
Work-Energy Theorem & Power
W = ΔE, P = W/t (watt)
Conservation of Mechanical Energy
KE + PE stays constant
Inclined Plane & Lever
MA = L/h; MA = Effort arm/Load arm
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