- #1

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I have zero clue how to start...can someone please help?

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- Thread starter sweetpete28
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- #1

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I have zero clue how to start...can someone please help?

- #2

ehild

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I have zero clue how to start...can someone please help?

Perhaps starting with a free body diagram of forces, including the buoyant force?

ehild

- #3

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mg down = 857 * 9.81 = 8407.17

buoyant force (when block is submerged) = density of fluid x volume submerged in fluid x gravity

- #4

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a little more help please...

- #5

ehild

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The block is in equilibrium. What does it mean for the forces acting on it?

ehild

ehild

- #6

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- #7

ehild

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And what about the spring?

ehild

ehild

- #8

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This is where I'm confused...for spring, Mg = 1/2kx^2...but how does this factor in?

- #9

ehild

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This is where I'm confused...for spring, Mg = 1/2kx^2...but how does this factor in?

That is the energy. What is the force a spring exerts when it is stretched or compressed by x? Think of Hook's Law.

ehild

Last edited:

- #10

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It exerts a force equal to -kx

- #11

ehild

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It exerts a force equal to -kx

See picture. What is the direction of this force when the tank is filled with water and the spring is extended?

What is the direction when there is no water in the tank?

ehild

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