Waec Model Questions Vol1 2020 Agricultural Science Question 2

Practice objective / multiple choice question 2 from the 2020 Waec Model Questions Vol1 Agricultural Science examination.

Waec Model Questions Vol1 2020 Agricultural Science Objective / Multiple Choice Medium Difficulty
Question 2 WAEC_MODEL_QUESTIONS_VOL1 • 2020 • AGRICULTURAL_SCIENCE • objective

A farmer uses a class‑2 lever to lift a sack of grain weighing 250 kg. The load arm (distance from the fulcrum to the sack) is 0.20 m and the effort arm (distance from the fulcrum to the farmer's hands) is 0.80 m. The farmer can apply a maximum effort of 500 N. (a) Can the lever lift the sack with the given arm lengths? (b) If not, what is the minimum effort‑arm length required to lift the sack while keeping the load‑arm length unchanged?

Answer Options

A. No; a minimum effort‑arm length of 0.85 m is required
B. Yes; the current effort‑arm length of 0.80 m is sufficient
C. No; a minimum effort‑arm length of 1.10 m is required
Correct Answer D. No; a minimum effort‑arm length of 0.98 m is required
Correct Answer
D
Correct Option:
No; a minimum effort‑arm length of 0.98 m is required

About This Question

This is Waec Model Questions Vol1 2020 Agricultural Science Question 2. It is one of the objective questions from the 2020 Waec Model Questions Vol1 Agricultural Science examination.

Difficulty level: Medium .

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