Imagine holding two bricks under water. Brick A is just beneath the surface of t

Question

Imagine holding two bricks under water. Brick A is just beneath the surface of the water, while brick B is at a greater depth. The force needed to hold brick B in place is larger the same as smaller than the force required to hold brick A in place. A container is filled with oil and fitted on both ends with pistons. The area of the left piston is 10 cm2; that of the right piston 10,000 cm2. What force must be exerted on the left piston to keep the 10,000-N crate on the right at the same height? 10 N 1,000 N 10,000 N 107 N

Explanation / Answer

1)

B. The buoyant force on each brick is equal to the weight of water it displaces and does not depend on depth.

2)

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