Waec Model Questions Vol1 2021 Physics Question 23

Practice objective / multiple choice question 23 from the 2021 Waec Model Questions Vol1 Physics examination.

Waec Model Questions Vol1 2021 Physics Objective / Multiple Choice Medium Difficulty
Question 23 WAEC_MODEL_QUESTIONS_VOL1 • 2021 • PHYSICS • objective

A block‑and‑tackle system consists of two fixed pulleys and one movable pulley, giving an ideal mechanical advantage of 3. An effort of 200 N moves the effort rope through 0.90 m while the load (500 N) rises 0.25 m. Determine (i) the actual mechanical advantage, (ii) the efficiency of the system, and (iii) the magnitude of the constant friction force acting in the system.

Answer Options

A. MA = 2.3; Efficiency = 65.2%; Friction force = 68.4 N
B. MA = 3.0; Efficiency = 60.0%; Friction force = 70.0 N
C. MA = 2.8; Efficiency = 72.0%; Friction force = 55.0 N
Correct Answer D. MA = 2.5; Efficiency = 69.4%; Friction force = 61.1 N
Correct Answer
D
Correct Option:
MA = 2.5; Efficiency = 69.4%; Friction force = 61.1 N

About This Question

This is Waec Model Questions Vol1 2021 Physics Question 23. It is one of the objective questions from the 2021 Waec Model Questions Vol1 Physics examination.

Difficulty level: Medium .

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