JAMB Physics 2015 Objective — Question 13
Question 13 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2015 Objective paper, with the correct answer and a full explanation.
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A piece of cork floats in water because
- A. the upthrust on it when completely immersed in water is greater than its weight in airCorrect
- B. the surface of the water acts like an elastic skin
- C. the upthrust on it when completely immersed in water is equal to its weight in air
- D. there is no upthrust on it when it is completely immersed in water
Explanation
For an object to float, the upthrust when fully immersed must be at least equal to (greater than or equal to) its weight in air.
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