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ICSE Class 10 Physics Question 4 of 27

Solved 2023 Question Paper ICSE Class 10 Physics — Question 18

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Question

Question 2(iii)

The diagram shows wheel O pivoted at point A. Three equal forces F1, F2 and F3 act at point B on the wheel.

The diagram shows wheel O pivoted at point A. Three equal forces F1, F2 and F3 act at point B on the wheel. Which force will produce maximum moment about A? Give a reason for your answer in (a). ICSE 2023 Physics Solved Question Paper.

(a) Which force will produce maximum moment about A?

(b) Give a reason for your answer in (a).

Answer

(a) Force F1 produces the maximum moment.

(b) Moment of force = force x perpendicular distance from the point of application of the force to the pivot point.

As the three forces are equal in magnitude, the magnitude of moment of force will depend on the perpendicular distance from the point of application of the force to the pivot point.

The perpendicular distance from the line of action of F1 to the pivot point A is equal to the diameter of the wheel, while the perpendicular distance from line of action of F2 and F3 is less than the diameter, therefore, the moment produced by F1 will be greater than the moments produced by F2 and F3.