Free Fall Energy Calculator

From mass and drop height, compute potential energy, kinetic energy at impact, and impact speed.

Input

Enter the mass and drop height to compute potential energy, kinetic energy at impact, and impact speed.

Mass m

Enter the mass of the falling object.

Drop height h

Enter the height from which the object is dropped.

Gravity uses the standard value g = 9.80665 m/s squared.

Potential energy (equals kinetic energy at impact)

196.133J

Impact speed

14.004749 m/s

Impact speed (per hour)

50.417097 km/h

Potential energy

196.133 J

Kinetic energy

196.133 J

Potential energy U = m g h, impact speed v = sqrt(2 g h). By energy conservation, the kinetic energy K at impact equals U (air resistance ignored).

Potential energy is U = m g h [J], measured with the ground as the zero reference.
Ignoring air resistance, conservation of energy makes the kinetic energy just before impact equal to the potential energy (K = U).
Impact speed is v = sqrt(2 g h) [m/s] and does not depend on mass.
Gravity is taken as the standard value g = 9.80665 m/s squared.
Speed in km/h is v_kmh = v times 3.6 [km/h].

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