Kinetic Energy Calculator

Free momentum calculator — p = m·v in kg·m/s, with the kinetic energy alongside so you can see why momentum and energy are different ideas, a stopping force from any stopping time, and a second object to compare against.

Free fall calculator — fall time, impact velocity, and speed from any drop height and gravity, with an animated drop.

Free kinematics calculator — solve final velocity, acceleration, or displacement with the constant-acceleration equations.

Free impulse calculator — J = F·Δt = m·Δv, with peak force as well as average, deceleration in g, and an animated impact beside a force–time curve whose shaded area is the impulse.

Free Newton's second law calculator — F = m·a, with the acceleration in g, the time to 100 km/h, and a block that really accelerates beside a velocity–time line and a same-force-different-mass race.

Free torque calculator — τ = F·r·sinθ in N·m, lb·ft, lb·in and kg·cm, with the effective lever arm drawn as a perpendicular you can watch collapse as the angle closes, plus angular acceleration from τ = Iα.