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- Homework Statement
- I need help solving a problem about motor efficiency and an elevator

- Relevant Equations
- Weight of elevator: 1250Kg. Speed after 3 seconds: 2m/s +/- 0,10m. Motor efficiency: 0,80

I have tried to solve a problem about the amount of watts a motor needs to recive if i want an elevator of 1250Kg to move at a speed of 2m/s +/- 0,10m/s after 3 seconds. The motor has an efficiency of 0,80. I've tried looking at my teachers uni recording, but it doesn't seem to explain this part very well. Could someone with knowledge about this try to teach me how i should handle this task? I know that the motor efficiency makes it so that i need more watts, as 20% of the energy put into the motor vanishes into other forms of energy.