INDICA CON UNA CRUZ, LA AFIRMACION CORRECTA: -Los seres vivos empleamos energía para llevar a cabo funciones vitales, como nutrición y
respiración.
-En el Sistema Internacional de unidades, la unidad de Energía es el KWh.
-Cuando decimos que la Energía se ha degradado es porque la energía inicial que se transformó en
térmica no puede recuperarse.
-El origen de todas las energías es la materia orgánica.
-La energía eólica, es un tipo de Energía.

During your summer internship for an aerospace company, you are asked to design a small research rocket. the rocket is to be launched from rest from the earth's surface and is to reach a maximum height of 910 m above the earth's surface. the rocket's engines give the rocket an upward acceleration so it moves with acceleration of 16.0 m/s2 during the time t that they fire. after the engines shut off, the rocket is in free fall. ignore air resistance.

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

The position of a crate sliding down a ramp is given by x=(0.05t^3) m, y=(1.7t^2) m, z=(6−0.85t^5/2) m, where t is in seconds. (a) determine the magnitude of the crate's velocity when t = 2 s. (b) determine the magnitude of the crate's acceleration when t = 2 s.