# Power problem -- Mule pulling a wagon, convert work and power to time

## Homework Statement

a mule is pulling a load of gold on a wagon. If the mules power output is 746 watts. if in a certain time interval the total work done by the team on the wagon was 23,500,000 j, how long was that interval of time

## Homework Equations

I think its power = work divided by time

I don't have one

Dick
Homework Helper

## Homework Statement

a mule is pulling a load of gold on a wagon. If the mules power output is 746 watts. if in a certain time interval the total work done by the team on the wagon was 23,500,000 j, how long was that interval of time

## Homework Equations

I think its power = work divided by time

## The Attempt at a Solution

I don't have one

Why don't you try to use power=work/time? What is a watt in units of joules? Just try.

Why don't you try to use power=work/time. Just try.
that's the thing, I don't know the numbers. The time isn't mentioned so I would have to re arrange the formula. My guess would be work times power or work divided by time. Like 746 times 746 times 23,500,000 or divided that. Im dumb and I can't figure it out.

Dick
Homework Helper
that's the thing, I don't know the numbers. The time isn't mentioned so I would have to re arrange the formula. My guess would be work times power or work divided by time. Like 746 times 746 times 23,500,000 or divided that. Im dumb and I can't figure it out.

I'll rearrange it for you. If power=work/time then time=work/power. I'm dumb is pretty weak excuse. You have to do something here. Now try and do it. Look things up if you have to.

I'll rearrange it for you. If power=work/time then time=work/power. I'm dumb is pretty weak excuse. You have to do something here. Now try and do it. Look things up if you have to.
Would we have have to convert 746 watts into jouls? It would be 3,600,000. So will it be 23,500,000/3,600,000 = 1.44? Im sorry, it's not an excuse but it's hard for me to actually just sit down and think. Thats why I wont do AP physics next year.

Dick
Homework Helper
Would we have have to convert 746 watts into jouls? It would be 3,600,000. So will it be 23,500,000/3,600,000 = 1.44? Im sorry, it's not an excuse but it's hard for me to actually just sit down and think. Thats why I wont do AP physics next year.

Sorry, but if this one is a challenge then you probably shouldn't try AP physics. A watt is a joule/second. This is actually pretty elementary material. It's just dealing with basic algebra and physics units. I don't know what to say.

CWatters
Homework Helper
Gold Member
The time isn't mentioned so I would have to re arrange the formula. My guess would be work times power or work divided by time.

The formula you quoted was..

power(W) = work(J) divided by time(S)

So rearranging that gives..

Time(S) = work(J) divided by power(W).

NascentOxygen
Staff Emeritus