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# Physical Science

### Physical science for VAS students

TermDefinition
Speed (s) Units: m/s, km/h Formula: s = d/t
Velocity (v) Units: m/s, km/h - always includes a direction Formula: v = d/t
Distance (d) Units: m, km Formula: ---
Displacement (Δx) Units: m, km Formula: ---
Mass (m) Units: kg Formula: ---
Acceleration (a) Units: m/s/s - (m/s²) Formula: Δv/t
Acceleration due to gravity (g) 9.81 m/s²
Force (f) Units: N Formula: ---
Weight (fg) Units: N or lb Formula: fg = mg
Time (t) Units: s Formula: ---
Temperature (t) Units: K or °C Formula: ---
Momentum (p) Units: kg(m/s) Formula: p = mv
Kinetic energy (KE) Units: J Formula: 0.5 · m · v²
Gravitational Potential Energy (GPE) Units: J Formula: mgh
Thermal energy (Q) Units: Formula: m · c · Δtemperature
Work (w) Units: J Formula: fd
Power (p) Units: J/s - which is watts. Formula: P = w/t OR e/t
Ideal mechanical advantage (IMA) Units: --- Formula: Di / Do
Actual mechanical advantage (AMA) Units: --- Formula: Fo / Fi
Efficiency (e) Units: % Formula: (Wo / Wi) · 100
Friction (f) Units: N Formula: ---
Coefficient of friction (μ) Units: --- Formula: μ = F / fg
Specific heat (c OR cp) Units: J / (kg · °C) Formula: C = Q/(m · ΔT)
Voltage (v) Units: Volts Formula: V = IR
Current (I) Units: Amperes Formula: I = V / R
Resistance (R) Units: Ω (ohms) Formula: R = V /I
Electric power (P) Units: W Formula: P = IV
Electric energy (E) Units: J Formula: PT
Electricity Cost (---) Units: KWH Formula: E · price of energy
Ohms law V = IR
Created by: kangn8r