A digital animator produces a model of a person jumping on a trampoline. Which measure is a boundary condition of the model? the designation of zero potential energy as the height of the trampoline

the height of the first jump that the person makes on the trampoline

the velocity of the person as they fall back to the trampoline

the changes that occur in kinetic and potential energy

ipr and related laws.

there is no universally accepted definition of art. although commonly used to describe something of beauty, or a skill which produces an aesthetic result, there is no clear line in principle between (say) a unique piece of handmade sculpture, and a mass-produced but visually attractive item. we might say that art requires thought - some kind of creative impulse - but this raises more questions: for example, how much thought is required? if someone flings paint at a canvas, hoping by this action to create a work of art, does the result automatically constitute art?