Physics
A door lock is opened by turning the lever (handle) of length 0.2 m. If the moment of force produced is 1 Nm, then the minimum force required is:
- 5 N
- 10 N
- 20 N
- 0.2 N
Machines
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Answer
5 N
Reason —
Given,
Length of lever = Perpendicular distance of the line of action of the force = 0.2 m
Moment of force = 1 Nm
As, Moment of force = Force × Perpendicular distance of the line of action of the force
1 = force x 0.2
force = = 5 N
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