An anchor weighing 100lbs in water is attached to a chain weighing 3 lb/ft in water. Find the work done to haul the anchor and chain to the surface of the water from a depth of 25 ft.

Calc 2, applications to physics

Question

An anchor weighing 100lbs in water is attached to a chain weighing 3 lb/ft in water. Find the work done to haul the anchor and chain to the surface of the water from a depth of 25 ft.

Calc 2, applications to physics

anonymous · Answer

Well, asuming there is no friction with the water we have that mechanical work is:

W=force*distance.

anonymous · Answer

Now, let's imagine what this anchor situation looks like to get a better understanding of what we are doing.

anonymous · Answer

I realized I actually figured this one out haha. I have another one that is similar to it though.

anonymous · Answer

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anonymous · Answer

Oh okay lol.

anonymous · Answer

Yeah, I got that one earlier today, but the other one is kind of weird. same thing, finding work.

anonymous · Answer

Don't forget to add the weight of the chain as well.

anonymous · Answer

A bucket of water of mas 20kg is pulled at a constant velocity up to a platform 40m above the ground. This takes 10 minutes, during which time 5kg of water drips out at a steady rate through a hole. find the work needed to raise the bucket

anonymous · Answer

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