How in the heck is ft*lb/sec a unit of power?

[779663]

Power is work or energy per unit time. If ft*lb/sec is a unit of power, then that must mean that ft*lb is a unit of energy.

Ft*lb is essentially a distance times a mass. If you take energy and divide it by a distance you get a force, but if you take ft*lb and divide it by a distance all you get is a mass (lb).

So how the heck can ft*lb/sec be a measure of power?

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[Kpw101]

Pounds is considered a Force and Force times distance = Work. Work over time = Power. Pounds isn't mass, it's the weight of a certain mass under a certain gravity; pretty much like newtons.

 

[779663]

Pounds is considered a Force and Force times distance = Work. Work over time = Power. Pounds isn't mass, it's the weight of a certain mass under a certain gravity; pretty much like newtons.

But isn't there a conversion from lbs to kg? Wouldn't that mean they both measure the same things?

Your explanation makes sense, I'm just trying to wrap my head around this

 

[Kpw101]

But isn't there a conversion from lbs to kg? Wouldn't that mean they both measure the same things?

Your explanation makes sense, I'm just trying to wrap my head around this

Yes, there's a conversion from lbs to kg on Earth. There is a different conversion for Mars, and there is a different conversion for the moon. Lbs is a force, kg is mass. Lbs varies under gravity; Kg does not because it's a mass. Just how Newtons changes depending on the gravity, lbs also changes. You would be lighter on the moon. Does this make a little more sense?

 

[779663]

Yes, there's a conversion from lbs to kg on Earth. There is a different conversion for Mars, and there is a different conversion for the moon. Lbs is a force, kg is mass. Lbs varies under gravity; Kg does not because it's a mass. Just how Newtons changes depending on the gravity, lbs also changes. You would be lighter on the moon. Does this make a little more sense?

Yes I get it now. Thanks for clearing that up. You never use pounds in these sorts of questions so I just relies on my every day knowledge of it and assumed it was the same as kilos.

I appreciate you clearing that up for me