Calculating Constant speed of an Elevator Rising

  • Thread starter Millacol88
  • Start date
  • #1
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Homework Statement


The motor for an elevator can produce 14kW of power. The elevator has a mass of 1100 kg, including its contents. At what constant speed will the elevator rise?


Homework Equations


I'm not really sure. Probably Gravitational potential = mgh. Kinetic energy = 1/2mv^2 because its looking for speed.


The Attempt at a Solution


I'm really not sure. It doesn't seem like enough information is given to solve for anything. There's probably some algebraic manipulation I'm missing.
 

Answers and Replies

  • #2
52
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Consider work done per second (14 kJ) - what increase in height does that correspond to (14kJ = mgh)?

-S

Homework Statement


The motor for an elevator can produce 14kW of power. The elevator has a mass of 1100 kg, including its contents. At what constant speed will the elevator rise?


Homework Equations


I'm not really sure. Probably Gravitational potential = mgh. Kinetic energy = 1/2mv^2 because its looking for speed.


The Attempt at a Solution


I'm really not sure. It doesn't seem like enough information is given to solve for anything. There's probably some algebraic manipulation I'm missing.
 

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