- #1
ChessEnthusiast
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Homework Statement
An elevator is running upwards at the constant speed v. The magnitude of opposing forces is [tex]F_o[/tex]. The elevator's mass is [tex]m[/tex] and the voltage is [tex]V[/tex]
Find the magnitude current in the elevator's engine.
2. The attempt at a solution
I tried to solve this task by energy equations:
[tex]VI\Delta t = (mg+F_o)\Delta x[/tex]
But now I'm stuck. Two variables in one equation and it doesn't seem as if a simultaneous equation could by found.
Thank you for advice in advance.
EDIT:
Actually, I have just noticed that if we re-engineer this equation:
[tex]I = \frac{(mg+F_o)\Delta x}{V\Delta t}[/tex]
and [tex]\frac{dx}{dt} = v[/tex]
then:
[tex] I = \frac{mg+F_o}{V}v [/tex]
Is this answer correct?