is "physical energy" a painting?
No, it was a plaster model.
George Frederic Watts
 plaster model
who is the artist of "after the deluge" painting? George Frederic Watts mention a few of his works? Hope and Love and Life
wiki:17808579
George Frederic Watts [SEP] "Physical Energy"
Although best known as a painter, Watts was also a sculptor. After completing a commission for the Duke of Westminster for an equestrian monument to commemorate his ancestor, Hugh Lupus, Watts set to work on a new plaster model of another horse and rider, without specific reference to any individual, in 1883. Seeking to reinvigorate the rhetoric of the equestrian monument for the modern age, he was still working on it at the time of his death in 1904. The plaster model was part of the artist's bequest to Watts Gallery, and, also in 1904, the first bronze cast of the work (made in 1902 at the Parlanti Foundry) became the artist's last submission to the Royal Academy's summer exhibition.