# Work Done by a Force

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### Work Done by a Force

The following diagram gives the formula for work done by a force. Scroll down the page for more examples and solutions on how to use the formula.

In this lesson, we will
• Describe what is meant by work done.
• Calculate work done by a force acting on a force.

Work is done whenever energy is transferred from one store to another.
Mechanical work involves using a force to move an object.
Electrical work involves a current transferring energy.
Work done (J) = Force (N) x Distance (m)

Example:
During braking, a force of 2000N is applied to the brakes of a car. The car takes 20m to come to a stop. Calculate the work done.

Examples:
1. A person with a mass of 75kg travels a distance of 10m in a lift. Calculate the work done by the lift moving the person.
2. A person with a mass of 50kg walks up a flight of stairs. The distance from the bottom of the stairs to the top is 5m. Calculate the work done by the person climbing the stairs.

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