Posted by **Jim** on Monday, December 5, 2011 at 10:00am.

A 90 kg mover climbs a ladder to a height of 8 m in 32 s. Find the power rating of the mover. I solved by using P= mgh/t and came up with 220.5 watts. Is this correct or am I suppose to use P=w/t and not use gravity in the equation?

- Physics -
**Damon**, Monday, December 5, 2011 at 10:03am
P= mgh/t

is correct.

Potential energy gained is m g h Joules.

Power is energy per unit time, Joules per second or Watts.

- Physics -
**bobpursley**, Monday, December 5, 2011 at 10:04am
work= change in potential energy= mgh

You did use it.

## Answer this Question

## Related Questions

- Physics - A 90 kg mover climbs a ladder to a height of 8 m in 32 s. Find the ...
- physics - A 90 kg mover climbs a ladder to a height of 8 m in 32 s. Find the ...
- physics - A mover pushes a couch a distance of 4 m to the top of a ramp into ...
- physics - A mover pushes a couch a distance of 4 m to the top of a ramp into the...
- Physics - Amy walks at an average speed of 1.75 m/s toward her airport gate. ...
- Intro Physics - Newton's third rule - a piano mover raises a 1000 N piano at a ...
- physics - A 500g ball is dropped into a well that is 10m deep. A)What is the ...
- Physics - A 500g ball is dropped into a well that is 10m deep. A)What is the ...
- Science-Physics - A mover is pushing a crate across the floor. He exerts a force...
- Physics - A mover pushes a 60 lb box 30 ft along a level floor at constant speed...

More Related Questions