A uniform 13-kg trap door is oriented horizontally and hinged as shown. What is the magnitude of the torque on the door at the instant that the release is activated and the door can freely rotate? 
Definitions:
Cable TV Service
A system of delivering television programming to consumers via radio frequency signals transmitted through coaxial cables or digital light pulses through fiber-optic cables.
Excludable
A characteristic of a good or service that allows owners or producers to prevent others from using it without paying.
Rival In Consumption
A characteristic of a good whereby its use by one person diminishes its availability for use by another person, contrasting with non-rival goods.
Gym Membership
A paid subscription that grants an individual access to a gym's facilities and equipment for a set period of time, promoting physical fitness and health.
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