Which unit is used to measure work?

Work is defined as the transfer of energy that occurs when a force is applied to an object and the object moves a certain distance in the direction of that force. The mathematical formula for work is given by:

[ \text{Work} = \text{Force} \times \text{Distance} \times \cos(\theta) ]

where (\theta) is the angle between the force and the direction of motion.

The SI unit of work is the Joule. One Joule is defined as the amount of work done when a force of one Newton is applied over a distance of one meter in the direction of the force. Thus, when considering the measurement of work, it is essential to use the Joule, as it directly correlates to the variables that define work.

In contrast, other units listed are associated with different physical quantities: Pascals measure pressure (force per unit area), Newtons measure force, and Watts measure power (the rate at which work is done). Therefore, the correct unit to measure work is indeed the Joule.