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A horizontal wooden plank is pivoted at one end, as shown.
The plank has a mass of and a length of . The centre of gravity of the plank is a distance of from the pivot. What is the moment of the weight of the plank about the pivot?
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and a length of 
. The centre of gravity of the plank is a distance of 
from the pivot. What is the moment of the weight of the plank about the pivot?
. (Option C)
