How is a joule defined?
A: it is the force needed to make an object with a mass of 1 kilogram travel 1 meter.
B: it is the work done when a force of 1 newton is applied to accelerate an object by 1 kilogram per second squared.
C: it is the force needed to make an object with a mass of 1 kilogram accelerate by 1 kilogram per second squared.
D: it is the work down when a force of 1 newton is applied to an object for a distance of 1 meter.