Neco 2019 Agricultural Science Question 3

Practice practical question 3 from the 2019 Neco Agricultural Science examination. This question covers Farm Tools .

Neco 2019 Agricultural Science Practical

Topic: Farm Tools

Question 3 NECO • 2019 • AGRICULTURAL_SCIENCE • practical

A farmer is using a hand hoe to loosen soil in a garden bed. The hoe consists of a metal blade attached to a wooden handle that pivots at the blade. The farmer sets up a simple lever experiment as follows: the pivot (blade) is fixed, the distance from the pivot to the point where the effort is applied on the handle is measured as 0.80 m, and the distance from the pivot to the centre of the blade (load arm) is 0.20 m. Using a spring‑balance, the farmer records an effort force of 30 N required to lift the blade vertically. The blade is then lifted through a vertical distance of 0.50 m. Answer the following:

( a )

State the three main parts of the hand hoe and give one function of each part.

( b )

Calculate the mechanical advantage (MA) of the hoe as a lever and determine the weight of the blade (in newtons) that is being lifted.

( c )

Using the weight found in (b), compute the work done in lifting the blade through the 0.50 m vertical distance. Express your answer in joules (J).

( d )

List two possible sources of error in this experiment and suggest one practical way to minimise each error.

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This is Neco 2019 Agricultural Science Question 3. It is one of the practical questions from the 2019 Neco Agricultural Science examination.

The question covers Farm Tools .

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