JAMB Physics 2021 Objective — Question 19
Question 19 of 40 from the Joint Admissions and Matriculation Board (JAMB) Physics 2021 Objective paper, with the correct answer and a full explanation.
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Machine VR=5, efficiency=75%. Effort to lift 150 N load:
- A. 40 NCorrect
- B. 50 N
- C. 20 N
- D. 30 N
Explanation
MA=0.75×5=3.75; Effort=150/3.75=40 N.
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