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Question
A nut is opened by a wrench of length 25 cm. If the least force required is 10 N, find the moment of force needed to turn the nut.
Solution
Distance = 25 cm = `25/100` = 0.25 m
Force = 10 N
Moment of force = ?
Moment of force = Force × Distance
= 10 × 0.25
= 2.5 N 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.
