Physics Calculators (Page 32)
Velocity, mechanics, energy, electricity and physics tools.
Specific Impulse Calculator
Enter thrust and propellant mass-flow rate to compute specific impulse Isp=F/(ṁ·g₀), exhaust velocity v_e=Isp·g₀ and engine class. Merlin 7600 kN, ṁ=2600 kg/s → Isp≈282 s, v_e≈2767 m/s.
Thrust-to-Weight Ratio Calculator
Enter total thrust and total mass to compute TWR=F/(m·g₀) and liftoff capability. Falcon 9: 7600 kN, 550 t → TWR≈1.41; Saturn V ≈1.19; must exceed 1 to take off.
LED Resistor Calculator
Compute the series resistor for an LED: R = (V_cc − V_f)/I.
Voltage / Ohm's Law Calculator
Compute voltage, current or resistance from Ohm's law V=I·R (given two, find the third). Supports unit prefixes (m/k/M).
Force Calculator
Enter mass and acceleration (or force and one of them) to compute the missing quantity via F = m·a.
Weight Calculator
Find weight W = m·g. Enter mass and g for weight, or weight and g for mass.
Electric Current Calculator
Compute current I = Q/t, I = V/R, or I = P/V.
Distance Calculator (Kinematics)
Compute distance from velocity & time, or with acceleration (s = ut + ½at²).
Mass Calculator
Enter weight (force) and gravitational acceleration to compute mass via m = W/g.
Wavelength Calculator
Compute the wavelength λ = v/f (wave speed ÷ frequency), or invert to find frequency f=v/λ. Complements the frequency and speed calculators.
Work (W) Calculator
Compute the work done by a force: W = F·d·cos(θ).
Velocity Calculator
Find average velocity v = Δd/Δt. Enter distance and time for velocity, or velocity and time for distance.