Question

A rock suspended by a spring scale weighs 5N out of water and 3N when submerged in water. What is the buoyant force on the rock?

Answer 1

`\text{ b. None of the above}`

Step-by-step explanation

The buoyant force of the rock is the difference between the weights of the rock out of water and in water.

Hence, the buoyant force on the rock is:

`\begin{gathered} F_B=5-3 \\ F_B=2N \end{gathered}`

Hence, the correct option is option b (None of the above).