Una persona deja caer una pelota desde una ventana que está a 80 metros de la altura sobre el suelo. Calcular, a) ¿Qué tiempo tardará en caer?, b) ¿Con qué magnitud de velocidad choca contra el suelo?

he kicked it 10 feet straight up into the air? i think this works.

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.

i don't know that i agree with that but what's the question ?

another example of kinetic energy would be,

kinetic energy   >     moving energy

answer   >   letter choice (c),   a hammer falling off a table.

hope that !                                         : )