A girl rides her bike 5.1 km due east. While riding she experiences a resistive force from the air that has a magnitude of 2.8 N and points due west. She then turns around and rides due west, back to her starting point. The resistive force from the air on the return trip has a magnitude of 3.2 N and points due east.(a) Find the work done by the resistive force during the round trip.

The work done by the resistive force during the round trip is -30,600 J

Explanation:

A round trip is to and fro.

To:      5.1 km →     ← R₁ = 2.8 N

Fro:     → R₂ = 3.2 N     ← 5.1 km

5.1 km = 5,100 m

∴ Work done = -2.8 x 5,100 -3.2 x 5,100

                      = -14,280 - 16,320

                      = -30,600 J

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.