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A ball floats on the surface of water in...

A ball floats on the surface of water in a container exposed to atmosphere.
Statement-1 : If the container is shifted to moon, the ball will rise a little (gravity on moon is `(1)/(6)`th that on the earth).
And
Statement-2 : Buoyant force on the ball will decrease.

A

Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-1

B

Statement-1 is True, Statement-2 is True, Statement-2 is not a correct explanation for Statement-1

C

Statement-1 is True, Statement-2 is False

D

Statement-1 is False, Statement-2 is True

Text Solution

AI Generated Solution

The correct Answer is:
To solve the problem, we need to analyze both statements regarding the behavior of a floating ball when the container is moved from Earth to the Moon. ### Step-by-step Solution: 1. **Understanding the Floating Condition**: - A ball floats in a liquid when the buoyant force acting on it is equal to its weight. This can be expressed as: \[ F_b = mg \] - Here, \( F_b \) is the buoyant force, \( m \) is the mass of the ball, and \( g \) is the acceleration due to gravity. 2. **Buoyant Force Calculation**: - The buoyant force can also be expressed in terms of the density of the liquid (\( \rho \)), the volume of the displaced liquid (\( V \)), and the acceleration due to gravity (\( g \)): \[ F_b = \rho V g \] - For the ball to float, we have: \[ \rho V g = mg \] - This implies that the volume of the ball submerged in the liquid is such that the weight of the displaced liquid equals the weight of the ball. 3. **Effect of Moving to the Moon**: - On the Moon, the acceleration due to gravity is \( \frac{1}{6} \)th that of Earth. Therefore, if the container is moved to the Moon, the weight of the ball will decrease: \[ mg_{moon} = m \left(\frac{g}{6}\right) = \frac{mg}{6} \] - The buoyant force will also be affected by the change in gravity: \[ F_{b, moon} = \rho V \left(\frac{g}{6}\right) = \frac{\rho V g}{6} \] 4. **Analyzing Statement 1**: - Statement 1 claims that the ball will rise a little on the Moon. - Since both the weight of the ball and the buoyant force decrease by the same factor of \( \frac{1}{6} \), the condition for floating remains unchanged. Thus, the ball will not rise or sink; it will remain at the same level. - **Conclusion**: Statement 1 is **false**. 5. **Analyzing Statement 2**: - Statement 2 claims that the buoyant force on the ball will decrease. - As calculated, the buoyant force on the Moon is indeed \( \frac{1}{6} \)th of what it is on Earth. Therefore, the buoyant force decreases. - **Conclusion**: Statement 2 is **true**. 6. **Final Conclusion**: - Since Statement 1 is false and Statement 2 is true, the correct answer is that Statement 1 is false and Statement 2 is true. ### Final Answer: - Statement 1: False - Statement 2: True
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