JAMB Physics 2013 Objective — Question 7
Question 7 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2013 Objective paper, with the correct answer and a full explanation.
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Calculate the apparent weight loss of a man weighing 70kg in an elevator moving downwards with an acceleration of 1.5ms⁻². [g=10ms⁻²]
- A. 686N
- B. 595N
- C. 581N
- D. 105NCorrect
Explanation
Since the elevator moves down, apparent weight = mg − ma = 70(10) − 70(1.5) = 700 − 105 = 595N. Normal weight = mg = 700N. Loss in weight = 700N − 595N = 105N.
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