Question
A body floats in a liquid contained in a beaker. The whole system falls freely under gravity. The upward thrust on the body due to the liquid then is
- Zero
- equal to the liquid displaced
- equal to the weight of the body in the air
- equal to the weight of the immersed portion in the liquid
Answer
equal to the liquid displaced
Explanation
The body is floating in the liquid, which means that it displaces a certain volume of the liquid. When the system falls freely under gravity, the buoyant force acting on the body due to the liquid will still be equal to the weight of the fluid displaced by the body.