Post-UTME Biology 2011 Objective — Question 21
Question 21 of 24 from the Post-UTME Screening (Post-UTME) Biology 2011 Objective paper, with the correct answer and a full explanation.
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A spring balance which is suspended from the roof of a lift carries a mass of 1kg at its free end. If the lift accelerates upward at 2.5ms^-2, determine the reading on the spring balance. (g=10ms^-2)
- A. 25.0N
- B. 12.5NCorrect
- C. 7.5N
- D. 4.0N
Explanation
Reading = m(g+a) = 1x(10+2.5) = 12.5N. (Note: this question is a near-duplicate of one found in the FUTO 2013/2014 Type D session in this same PDF set; the same independently-worked answer is used here.)
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