Question

A boat is floating in the river. What happens to the buoyant force on the boat if a man gets into this boat?

• A. It increases
• B. It decreases
• C. It remains the same
• D. It becomes zero

Answer 1

Answer: (A)

It increases

Answer is A.
When the man gets into the boat, it floats lower in water. The weight of water displaced increases. The buoyant force on boat increases.
Buoyant Force is an upward force on the object submerged in a fluid (completely or partially), that is equal to the weight of the fluid that is displaced by the object.
Therefore, the buoyant force on the boat increases, if a man gets into this boat.