What are the two primary forces acting on a floating object__________________?
Show answer Hide answer
Answer: A. buoyancy, gravity
Explanation
A floating object at rest in a fluid is in static equilibrium. Two primary vertical forces act on the body in opposite directions. Downward gravitational force balances perfectly with the upward buoyant force. Static equilibrium requires the sum of all vertical forces to equal zero. Gravity acts downward through the center of gravity based on the object mass. Buoyancy acts upward through the center of buoyancy based on displaced fluid volume.
Naval architecture relies on balancing these two forces to design stable watercraft. Loss of either force disrupts equilibrium, causing the object to sink or float away. Understanding these forces is essential for marine engineering and submarine design. Pressure is a distributed force field rather than an isolated opposing vector. Inertial forces only apply during acceleration, not in static floating equilibrium. Gravity and pressure interact, but buoyancy is the direct resultant upward force.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
Related questions
Q1. How does the oscillation period of a floating body change when its metacentric height is increased_________________?
Show answer Hide answer
Answer: C. lower
The oscillation period of a floating body is inversely proportional to the square root of its metacentric height. A higher metacentric height increases restoring righting moments, causing the body to snap back faster fro...
Q2. Under what conditions is the tensile strength of wrought iron at its maximum _________________?
Show answer Hide answer
Answer: A. along the lines of slag distribution
Wrought iron manufacturing processes leave elongated fibrous slag inclusions embedded in the metal matrix. Tensile loads applied along the fiber direction engage the maximum strength of the iron. Cross-grain loading expl...
Q3. The total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface being 0.5 m below the water level will be ________________?
Show answer Hide answer
Answer: D. 2000 kg
Total hydrostatic pressure on a submerged vertical gate is calculated by multiplying water specific weight, gate area, and centroid depth. The vertical sluice gate has dimensions of two meters by one meter, yielding a to...
Q4. What inventory control methodology involves the two-bin system_________________?
Show answer Hide answer
Answer: A. ordering procedure
The two-bin system is a classic inventory control and ordering procedure used to manage stock levels efficiently. When the first bin empties completely, a replenishment order is triggered while inventory is drawn from th...
Q5. When is the total pressure force on a submerged flat surface calculated simply as area multiplied by centroidal pressure intensity___________________?
Show answer Hide answer
Answer: D. all of the above
Hydrostatic pressure calculation relies only on the vertical depth of the geometric centroid. Integrating pressure over horizontal, vertical, or inclined flat surfaces yields the exact same formula. Total force equals th...
Q6. What compositional data is provided by an ultimate analysis of fuel_____________________?
Show answer Hide answer
Answer: B. various chemical constituents, carbon, hydrogen, oxygen, etc, plus ash as per-cents by weight
An ultimate analysis provides a comprehensive elemental breakdown of a fuel sample by measuring chemical constituents. It determines exact mass percentages of carbon, hydrogen, nitrogen, sulfur, oxygen, and non-combustib...