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Physical Science
Physical science for VAS students
Term | Definition |
---|---|
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 |