d State Universi X ibiscms/mod/ibis/view.php?id 3161021 Gradebook Me Print calcu

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d State Universi X ibiscms/mod/ibis/view.php?id 3161021 Gradebook Me Print calculator Periodic Table Question 4 of 20 Sapling Learning of uggage is loaded onto an airplane by way of an inclined conveyor belt. The bag, which has a mass of 20.0 kg, travels 2.50 m up the conveyor belt at a constant speed 2.50 m hout slipping. If the conveyor belt is inclined at a 40.0 angle, calculate the work done on the bag by: the force of gravity (Wa) the normal force (WN) 40.0" the friction force (W) the conveyor belt (Woorveyor) the net force (Whet) 376 J -376 J Zero 491 J -491 J -315 J 315 J Wearveyor o Previous Give up 8 view soulion Check Answer 0 Next Exit

Explanation / Answer

gravity: work = mgh = 20kg * -9.8m/s² * 2.50m * sin40º = -314 J

normal: work = 0 J, since there is no displacement perpendicular to the belt

friction: work = 314 J

belt: I'd say work = 314 J; the belt and friction work are the same thing.

net force: work = 0 J, since the net force is zero ("constant speed").

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