Homework Help: physics

Posted by tom on Saturday, July 23, 2011 at 7:50pm.

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?

physics - drwls, Saturday, July 23, 2011 at 9:01pm
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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