Myrna S.

asked • 03/08/16

Is it possible to have two correct answers to this work done ?

a peole moving conveyor belt moves a 600 newton person a distance of 100 meters through the airport.
How much work was done?
shoul I assume there is any friction from this Question , As is Presented? And if yes why?
my son's answer is : there is no work because the force is vertical and the distance is horizontal

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Andrew M. answered • 03/08/16

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Mathematics - Algebra a Specialty / F.I.T. Grad - B.S. w/Honors

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A joule of work is the amount of work done by pushing with a force of one newton for a distance of one meter.
1 joule = 1 newton-meter.
 
J = 600(100) = 60,000 joules of work
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Myrna S.

i thought that in order to have that answer force and distance has to be in the same direction 
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03/08/16

Andrew M.

This is a floor conveyor belt, not an escalator. The belt is moving the same direction as it moves the people.  This problem is no different tjan the idea of using 10 newtons of force to push a box 2 meters across the floor. J = Force*Distance = 10(2) = 20 Joules
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03/08/16

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