Physics is the law.
Everything else is opinion.

Free calculators, simulations and guides that turn the laws of nature into better decisions.

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Kinetic Energy

Given: Mass 1,500 kg · Velocity 25 m/s
Kinetic energy: 468,750 J

Projectile Motion

Given: Launch speed 20 m/s · Launch angle 45 °
Range: 40.79 m

Electricity Cost

Given: Appliance power 2,000 W · Usage per day 3 hours · Electricity price 0.2 €/kWh
Cost per day: 1.2 €

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Kinetic Energy

KE = ½ × m × v²

Projectile Motion

R = v₀² · sin(2θ) / g

Newton's Second Law

Ohm's Law

I = V / R, P = V² / R

Electricity Cost

Cost = (W / 1000) × hours × price per kWh

Torque

τ = r × F × sin(θ)

Momentum

Free Fall

t = √(2h/g), v = √(2gh)

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Gravity 9.81 m/s² · each bounce loses ~18% of its energy · tap to add more

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