Physics
The diagrams below show a force F = 40 N acting on a rod AB pivoted at A in different directions. Identify the correct statement.
- P and S have opposite moments.
- The magnitude of the moment of force is maximum in R.
- The magnitude of the moment of force is maximum in P and Q.
- The moment of force in R is negative.
Force
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Answer
The magnitude of the moment of force is maximum in P and Q.
Reason
Option 1 Incorrect:
P & Q have same anticlockwise moment.
Option 2 Incorrect:
Maximum moment of force is for 90°. Here angle is not 90°.
Option 3 Correct:
Moment of force = force x perpendicular distance from pivot point.
For both P and Q, perpendicular distance from pivot point is maximum
Hence, the magnitude of the moment of force is maximum in P and Q.
Option 4 Incorrect:
R has anticlockwise moment which is taken positive.
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