Susan pushes her dad, David, on an ice rink with a force of 30 N. She weighs 45 kg and her dad weighs 100 kg. What are the accelerations of Susan and David?

a(Susan) = 0.67 m/s², a(dad) = 0.3 m/s²

Explanation:

Assuming no other forces acting on both bodies in the horizontal direction (neglecting friction due to they are standing on ice), the interactions between them must obey Newton's 3rd law, so the magnitude of the force exerted by Susan on her dad (30N) must be equal to the one exerted by her dad on her.

So we can find the accelerations, just applying to their masses Newton's 2nd Law, as follows:

Fs = ms*as = 30 N

⇒ as =

Fd = md*ad = 30 N

tbh i dont know ether

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.