Question

An empty bucket of negligible weight is inverted, forced down, and submerged completely slightly below the water's surface. Select the outcome from below that would be an incorrect outcome.

• A. The pressure of air in the bucket rises above atmospheric pressure
• B. If released, the bucket will sink
• C. The water enters the bucket up to some distance above the rim
• D. A force needs to be exerted downward on it to keep it submerged

Answer 1

Answer:

B. If released, the bucket will sink

When an empty bucket is submerged in water, the pressure of air inside the bucket rises above atmospheric pressure. The water enters the bucket up to a certain distance above the rim until the weight of the displaced water equals the downward force required to keep the bucket submerged. A force needs to be exerted downward to keep the bucket submerged, and releasing the force will cause the bucket to rise due to the upward buoyant force.