How is a Newton defined in terms of force?

A Newton is fundamentally defined as the amount of force required to accelerate a mass of one kilogram at a rate of one meter per second squared. This definition comes from Newton's second law of motion, which states that force equals mass times acceleration (F = ma). Thus, if you have a mass of 1 kilogram and you want to increase its velocity by 1 meter per second for every second that passes, you will need to apply a force of 1 Newton.

The other choices do not accurately reflect this scientific definition. The force required to propel one liter of fuel is context-specific and does not align with a universal standard like the kilogram and meter per second. The force necessary to lift a rocket off the launch pad and the constant force needed to stabilize a rocket in flight would also vary greatly depending on multiple factors such as engine thrust, rocket design, and atmospheric conditions, making them insufficient as a precise definition of a Newton. These situations illustrate specific applications of force rather than a fundamental definition in physics.