# physics

a student tries to open a door at a distance of 1 cm from the hinge at a distance of 10 cm from the hinge and at a distance of 50 cm from the hinge why is a larger force required at 1 cm than at 50 cm?

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1. You need a certin torque (force x lever arm distance from the hinge) to move the door. You need most force when the lever arm distance is least.

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posted by drwls

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