Physics
The diagram shows a wheel with a handle. Two forces, F1 and F2 of equal magnitudes are acting on the handle as shown in the diagram.
(a) Which force produces negative moment?
(b) Is the wheel in equilibrium? (Yes or No)
(c) Justify your answer stated in (b).
Force
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Answer
(a) The force F1 produces the negative moment because it tends to rotate the wheel in the clockwise direction, which is taken as negative.
(b) No, the wheel is not in equilibrium.
(c) For equilibrium, the sum of clockwise moments must be equal to the sum of anticlockwise moments about the centre O. Although F1 and F2 have equal magnitudes, their perpendicular distances from the centre (moment arms) are different. Hence, the moments produced by them are not equal and opposite, so the net moment is not zero and the wheel is not in equilibrium.
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