2.- Un móvil viaja en línea recta y acelera
apenas pasa el punto origen de
coordenadas. Su aceleración es constante
de 4 m/s
2
. En t=0 s, está a 5m del origen
moviéndose hacia +x a razón de 15 m/s.
Determine:
a) Su velocidad luego de 2 s.
b) Su posición donde logra una velocidad
de 25 m/s.

a) 23 m/s

b) 43 m

Explanation:

a)

To find the velocity at t = 2s you use the following formula:

  (1)

a: acceleration = a = 4m/s^2

t: time = 2s

vo: initial velocity = 15m/s (for x = 5m)

you replace the values of t and a in the equation (1):

b)

The position in which the velocity is 25m/s can be calculated by the following formula:

This is the position for an initial speed of 15m/s. The position of the object from the origin is the sum of the last result with the initial position, that is:

hence, the position is 43 m from the origin

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.