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Question
The moment of a force of 10 N about a fixed point O is 5 N m. Calculate the distance of the point O from the line of action of the force.
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Solution 1
Moment of force = force x perpendicular distance of from point O
Moment of force = F x r
5Nm = 10 x r
R = 5/10 = 0.5 m
Solution 2
Given: Moment of force = 5 Nm
Force = 10 N
According to the formula,
Moment of force = F × OA
5 Nm = 10 × OA
OA = 5/10
= 0.5 m
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Assertion & Reasoning
- Assertion: The sum of the clockwise moments is equal to the sum of the anticlockwise moments.
- Reason: The principle of conservation of momentum is valid if the external force on the system is zero.
