Suspended from a spring balance is a water bucket. An iron object is lowered into the water from a separate mount without contacting the bucket walls. The spring balance measurement will_________________?
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Answer: C. remain same
Explanation
Newton's third law dictates that an equal and opposite reaction force acts on the water container. The downward buoyant force exerted by the iron object creates an identical upward reaction on the water. These internal forces cancel out externally, leaving the total weight measured by the spring balance unchanged. Newton's third law states that every action force produces an equal and opposite reaction force. Archimedes principle explains that submerged objects experience an upward buoyant force from displaced fluid. Spring balances measure the total apparent gravitational force exerted downward by the suspended water bucket.
The measurement will not increase because the suspended iron object does not rest on the container bottom. The scale reading will not decrease since the displaced water weight is transmitted back to the bucket. Immersion depth does not alter the total force transmitted to the balance as long as contact is avoided.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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