JAMB Physics 2011 Objective — Question 3
Question 3 of 49 from the Joint Admissions and Matriculation Board (JAMB) Physics 2011 Objective paper, with the correct answer and a full explanation.
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A man standing on a lift that is descending does not feel any weight because
- A. A. there is no reaction from the floorCorrect
- B. B. there is no gravitational pull on the man
- C. C. the inside of the lift is airtight
- D. D. the lift is in vacuum
Explanation
A person inside a lift that is falling freely will feel weightless as there is no reaction from the floor of the lift. Using R = mg - ma with a = g (free fall): R = mg - mg = 0.
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