Thor's Returning Hammer.
What pushes back when a hammer returns?
Loading the experiment…
What pushes back when a hammer returns?
Fit the assemblies, choose the inputs, then run the test.
An assumed force accelerates the hammer toward its receiver. The equal opposite force also moves the receiver. A massive receiver moves less, but it carries the same opposite momentum. The fictional force source must supply both kinetic energies.
One-dimensional, horizontal, frictionless guide. Hammer and receiver start at rest. A supernatural force pair of chosen constant magnitude acts until the hammer travels the selected distance. Force source work includes both bodies. No magnetic explanation or worthiness mechanism. The physical return time is reported; playback maps that event onto a 1.4 s inspection interval.
Read the source · OpenStax: work and kinetic energy ↗
Return the hammer with less than 10% receiver-to-hammer speed and under 350 J input work.
Activate an assumed return force and measure the reaction on the receiver.