A windmill is pushed by four external forces as shown. Calculate force F required to make the windmill stand still.

2 N

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- 4 N

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6 N

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- 16 N

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Solution

The correct option is B $- 4 N$
The force F required to make windmill stand still when the moment of force is equal to net moment of forces.
Moment of force $M =$ force $\times$ perpendicular distance from pivot
Here, $F \times 4 = (3 \times 2) + (2 \times 3) + (1 \times 4) = 16$ or $F = 4 N$

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A windmill is pushed by four external forces as shown. Calculate force F required to make the windmill stand still.

The correct option is B −4 NThe force F required to make windmill stand still when the moment of force is equal to net moment of forces.Moment of force M= force × perpendicular distance from pivotHere, F×4=(3×2)+(2×3)+(1×4)=16 or F=4N

The correct option is B $- 4 N$
The force F required to make windmill stand still when the moment of force is equal to net moment of forces.
Moment of force $M =$ force $\times$ perpendicular distance from pivot
Here, $F \times 4 = (3 \times 2) + (2 \times 3) + (1 \times 4) = 16$ or $F = 4 N$