Answer: 800 Joules
Explanation:
The Work [tex]W[/tex] done by a Force [tex]F[/tex] refers to the release of potential energy from a body that is moved by the application of that force to overcome a resistance along a path with distance [tex]d[/tex].
Work is a scalar, and its unit in the International System of Units is the Joule (like energy). Therefore, 1 Joule is the work done by a force of 1 Newton when moving an object, in the direction of the force, along 1 meter:
[tex]1J=(1N)(1m)=Nm[/tex]
Now, when the applied force is constant and the direction of the force and the direction of the movement are parallel (as this case), the equation to calculate it is:
[tex]W=(F)(d)[/tex]
Where:
[tex]F=20 N[/tex]
[tex]d=40 m[/tex]
Then:
[tex]W=(20 N)(40 m)[/tex]
[tex]W=800 Nm=800 J[/tex]
