Push your study table in a certain direction with a force of magnitude say 10N. At the same time ask your mother, sister or brother to push the same table with a force of magnitude say 15N. Calculate the magnitude of the resultant force on study table and its direction when forces are acting in same direction and when forces are acting in opposite direction to each other.
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Magnitude of force applied on each end = 10 N .
The moment of force τ = r × F. Hence in bothe the cases, moment of force is in the clockwise direction, and the moment of forces add to one another.
The magnitude of τ = 2 × 10 × 2 = 40 Nm in the clockwise direction.
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