Auniform 17 kg door that is 2.2 m high by 1 m wide is hung from two hinges that are 20 cm from the top and 20 cm from the bottom. if each hinge supports half the weight of the door, find the magnitude and direction of the horizontal components of the forces exerted by the two hinges on the door.

46.3 N , Left

46.3, Right

Explanation:

= horizontal component of force at upper hinge A

= mass of the door = 17 kg

= distance between two hinges = 1.8 m

= width of the door = 1 m

Using equilibrium of torque about B

Direction : Towards left

= horizontal component of force at lower hinge B

Using equilibrium of force along vertical direction

Direction : Towards right

sleep paralysis is a parasomnia, events associated with sleep.

sleep paralysis happens when you are in the middle of waking up or falling asleep. it is the feeling of being conscious but unable to move. it definitely involves hallucinations.

i had a friend that had sleep paralysis and he told me a story one time where he was laying in bed and he couldn't move his body no matter how hard he tried and there was someone standing in the corner of his room coming towards him. he couldn't move and you can't "wake up" because you are already conscious. sometimes sleep paralysis can be triggered by frequent waking up during the night based off of multiple trips to the bathroom, or if you had ever been abused, sleep paralysis can start happening from things like that.