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A barge is pulled down a canal by a horse walking beside the canal.If the angle of the rope is 60.0 the force exerted is 400. N and the barge is pulled 100.m, how much work did the horse do?

Respuesta :

The work W done by a force F on an object along a distance d when the angle between the force and the displacement is θ, is given by:

[tex]W=F\cdot d\cdot\cos \theta[/tex]

Substitute θ=60°, F=400N and d=100m to find the work:

[tex]W=(400N)(100m)\cos (60)=20,000J[/tex]

Therefore, the work done by the horse is equal to:

[tex]20,000J[/tex]

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