Question Detail
Question
A man weighing 64 kg stands on a scale in an elevator. What does the scale read when the elevator moves downward with an acceleration of 5 m/s²? (g = 10 m/s²)
Correct Answer
Option C is the correct answer.
Detailed Explanation
When the elevator accelerates downward, the normal force N (scale reading) is less than weight. N = m(g - a) = 64(10 - 5) = 64 × 5 = 320 N.
Hint
Apparent weight in an accelerating elevator is m(g ± a), with minus for downward acceleration.