In SI units, kg   m 2   s - 2 is equivalent to which of the following?

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 $\mathrm{kg} {\mathrm{m}}^{-1} {\mathrm{s}}^{-2}$.