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Multiple Choice

What is the SI unit of work?

Work is the transfer of energy that happens when a force moves an object through a distance. The SI unit for this quantity comes from multiplying force by distance: force measured in Newtons and distance in meters give Newton-meters as the unit, which is defined as a Joule. In base units, a Joule equals kilogram times meter squared per second squared (kg·m^2/s^2). A handy check: applying a force of 1 Newton to move an object 1 meter in the direction of the force does 1 Joule of work. It’s good to keep in mind that Watt measures power (how fast work is done), and Pascal measures pressure (force per area). Newton is the unit of force itself.

Work is the transfer of energy that happens when a force moves an object through a distance. The SI unit for this quantity comes from multiplying force by distance: force measured in Newtons and distance in meters give Newton-meters as the unit, which is defined as a Joule. In base units, a Joule equals kilogram times meter squared per second squared (kg·m^2/s^2). A handy check: applying a force of 1 Newton to move an object 1 meter in the direction of the force does 1 Joule of work. It’s good to keep in mind that Watt measures power (how fast work is done), and Pascal measures pressure (force per area). Newton is the unit of force itself.