One newton is therefore the force needed to accelerate one kilogram of mass at the rate of one metre per second squared in the direction of the applied force. A newton is defined as $1 \mathrm{kg} \mathrm{m} {\mathrm{s}}^{-2}$.

A watt is the unit of electrical power equal to one ampere under the pressure of one volt. A watt is defined as $1 \mathrm{kg} {\mathrm{m}}^2 {\mathrm{s}}^{-3}$.

The joule is equal to the amount of work done when a force of 1 newton displaces a mass through a distance of 1 metre in the direction of the force applied. A joule is defined as $1 \mathrm{kg} {\mathrm{m}}^2 {\mathrm{s}}^{-2}$.

The pascal (Pa) is the unit of pressure or stress in the International System of Units (SI). A pascal is defined as $\mathrm{kg} {\mathrm{m}}^{-1} {\mathrm{s}}^{-2}$.