Waec Model Questions Vol1 2017 Agricultural Science Question 3

Practice practical question 3 from the 2017 Waec Model Questions Vol1 Agricultural Science examination. This question covers Farm Tools .

Waec Model Questions Vol1 2017 Agricultural Science Practical
Topic: Farm Tools
Question 3 WAEC_MODEL_QUESTIONS_VOL1 • 2017 • AGRICULTURAL_SCIENCE • practical

A farmer is using a hand hoe to prepare a rectangular plot measuring 30 m by 20 m. The hoe has a mass of 2.5 kg and the farmer holds it at an angle of 30° to the horizontal while striking the soil. During the operation the farmer records the following data: each forward stroke moves the hoe 0.6 m, he makes 120 strokes per minute and works continuously for 25 minutes.

Question Parts

( a )
Determine the total distance travelled by the tip of the hoe during the whole operation (in metres).
( b )
Assuming the effective force exerted by the farmer on the hoe equals the component of the hoe’s weight acting along the direction of motion (weight × sin 30°), calculate the total work done on the soil (in joules).
( c )
Using the work obtained in (b) and the total time of operation, calculate the average power output of the farmer in watts (1 W = 1 J s⁻¹).
( d )
Identify two probable sources of error in the work calculation and suggest how each could be minimised.

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About This Question

This is Waec Model Questions Vol1 2017 Agricultural Science Question 3. It is one of the practical questions from the 2017 Waec Model Questions Vol1 Agricultural Science examination.

The question covers Farm Tools .

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