← Theme A · Space, Time & Motion
Physics · Cheatsheet

Theme A · Space, Time & Motion

Chapter 2 · Skills & Paper-2 practice

📋 Reference · always available
Propagation (±)
z=x±y⇒Δz=Δx+Δyz=x\pm y \Rightarrow \Delta z=\Delta x+\Delta y
Propagation (×÷)
Δzz=Δxx+Δyy\tfrac{\Delta z}{z}=\tfrac{\Delta x}{x}+\tfrac{\Delta y}{y}
Power
z=xn⇒Δzz=∣n∣Δxxz=x^n \Rightarrow \tfrac{\Delta z}{z}=|n|\tfrac{\Delta x}{x}
Gradient uncertainty
Half the (max−min acceptable line) gradients.
Quote
Uncertainty to 1 s.f.; value to the same decimal place.