Posted by **jerry** on Monday, October 12, 2009 at 7:34pm.

How long will it take a 1920 W motor to lift a 285 kg piano to a sixth-story window 16.0 m above?

- physics -
**MathMate**, Monday, October 12, 2009 at 8:38pm
Divide change in potential energy by the power of the motor.

- physics -
**jerry**, Wednesday, October 14, 2009 at 8:19pm
change in potential energy divided by the power. ( 1 W = 1 J/s)

Initial potential energy= mass* g* height

= mass * g*0

= 0

Final potential energy = mass* g* 16.0

finf diffence between final and initial and divide by Power. Answer will be in seconds(s)

- physics -
**Anonymous**, Sunday, March 2, 2014 at 1:06am
3.945 secomds

## Answer This Question

## Related Questions

- physics - How long will it take a 1630 W motor to lift a 285 kg piano to a sixth...
- Physics - How long will it take a 1830 W motor to lift a 285 kg piano to a sixth...
- physics - how long will it take a 1750-watts motor to a lift a 285-kg piano to a...
- physics - How long will it take a 1030 W motor to lift a 330 kg piano to a sixth...
- physics - How long will it take a 1280 W motor to lift a 345 kg piano to a sixth...
- Physics - How long will it take a 1080 W motor to lift a 330kg piano to a sixth-...
- Physics - How long will it take a 1080 W motor to lift a 330kg piano to a sixth-...
- Physics - How long will it take a 1080 W motor to lift a 330kg piano to a sixth-...
- physics - How long will it take a 230 W motor to lift a 335 kg piano to a sixth-...
- Salisbury University - How long will it take a 480 N motor to lift a 335 kg ...

More Related Questions