A man of weight W is standing on an elevator which is ascending with an acceleration a. The apparent weight of the man is_______________?
Correct answer: C. mg + ma
- A. mg
- B. mg - ma
- C. mg + ma
- D. mg - ma
Explanation
For an elevator accelerating upward, the floor must provide extra upward force, so the apparent weight is N = m(g + a), written as mg + ma. Students may choose mg - ma by applying the formula for a downward-accelerating elevator instead. Options b and d are duplicate distractors, but option c is the correct expression.
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