InterviewSolution
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InterviewSolution
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A boy is about to close a large door by applying force at A and B as shown. State with a reason, which of the two positions, A or B, will enable him to close the door with least force. |
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Answer» Boy has to apply more force at point B as compared to point A, because point B is at least distance from the hinge of the door while point A is at maximum distance from hinge of the door. Opening of door applies a moment, which is. given by, M = F × perpendicular distance F ∝ \(\frac{1}{distance}\) More is the distance from the axis of rotation less will be the force. |
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