Por favor necesito ayuda con esta tarea rápido tengo solo 20 minutos 1. Defina con sus propias palabras movimiento y caída libre.

2. Un objeto se deja caer desde una altura de 12 m. Determinar:

Las ecuaciones de movimiento.
El tiempo que tarde en caer el objeto.
Velocidad antes de tocar el suelo

3. Defina con sus propias palabras, que es el movimiento y la mecánica, de
ejemplo con ilustración..

Two polarizers are oriented at 70∘∘ to one another. unpolarized light falls on them. what fraction of the light intensity is transmitted?

Sort the images based on whether there's a force of attraction or repulsion between the magnets shown. attraction repulsion

In an old-fashioned amusement park ride, passengers stand inside a 3.0-m-tall, 5.0-m-diameter hollow steel cylinder with their backs against the wall. the cylinder begins to rotate about a vertical axis. then the floor on which the passengers are standing suddenly drops away! if all goes well, the passengers will “stick” to the wall and not slide. clothing has a static coefficient of friction against steel in the range 0.60 to 1.0 and a kinetic coefficient in the range 0.40 to 0.70. part a what is the minimum rotational frequency, in rpm, for which the ride is safe? express your answer using two significant figures. f f = rpm