Neco Model Questions Vol1 2020 Physics Question 8

Practice objective / multiple choice question 8 from the 2020 Neco Model Questions Vol1 Physics examination.

Neco Model Questions Vol1 2020 Physics Objective / Multiple Choice Medium Difficulty
Question 8 NECO_MODEL_QUESTIONS_VOL1 • 2020 • PHYSICS • objective

A block‑and‑tackle system consists of three fixed pulleys and two movable pulleys. A load of \(500\) N is lifted at constant speed. The effort applied to the rope is \(150\) N. (a) Determine the ideal mechanical advantage (IMA) of the system. (b) Determine the actual mechanical advantage (AMA). (c) Calculate the efficiency of the system as a percentage. (d) If the rope is pulled with a speed of \(0.60\) m s\(^{-1}\), what is the speed of the load?

Answer Options

A. IMA = 3; AMA = 3.33; efficiency ≈ 83 %; load speed = 0.20 m s⁻¹
B. IMA = 5; AMA = 2.5; efficiency ≈ 50 %; load speed = 0.12 m s⁻¹
Correct Answer C. IMA = 4; AMA = 3.33; efficiency ≈ 83 %; load speed = 0.15 m s⁻¹
D. IMA = 4; AMA = 2.78; efficiency ≈ 70 %; load speed = 0.18 m s⁻¹
Correct Answer
C
Correct Option:
IMA = 4; AMA = 3.33; efficiency ≈ 83 %; load speed = 0.15 m s⁻¹

About This Question

This is Neco Model Questions Vol1 2020 Physics Question 8. It is one of the objective questions from the 2020 Neco Model Questions Vol1 Physics examination.

Difficulty level: Medium .

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