Finding average power for an object being vertically lifted

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To find the average power required for a ski lift raising 100 passengers weighing an average of 668 N each to a height of 175 m in 60 seconds, the correct approach involves calculating the total work done. The total weight is 100 passengers times 668 N, resulting in 66,800 N. The work done (W) is then calculated as W = Fd, where F is the total weight and d is the height. The average power (P) is found using P = W/t, leading to the correct power output. The initial mistake involved incorrectly dividing by distance instead of using the total weight and height to calculate work.
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Homework Statement



If a ski lift raises 100 passengers averaging 668 N in weight to a height of 175 m in 60 s, at constant speed, what average power is required of the force making the lift?

Homework Equations


P_instantaneous=Fv
P=W/t
W=Fd

The Attempt at a Solution


I tried to solve this by first using W=fd to find W...so 668/175=3.817
I then used P=W/t so 3.817/60
however this answer was wrong...what am I doing wrong?
 
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emilykorth said:

Homework Statement



If a ski lift raises 100 passengers averaging 668 N in weight to a height of 175 m in 60 s, at constant speed, what average power is required of the force making the lift?

Homework Equations


P_instantaneous=Fv
P=W/t
W=Fd

The Attempt at a Solution


I tried to solve this by first using W=fd to find W...so 668/175=3.817
I then used P=W/t so 3.817/60
however this answer was wrong...what am I doing wrong?
668 Newtons is the average weight of one of the passengers.

Secondly, why are you dividing by the distance?
 
wow I was making a really stupid mistake. Thanks for the help, I figured it out
 

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