Una bola de acero rueda y cae por el borde de una mesa desde 4ft por encima del piso. Si golpea el suelo a 5ft de la base de la mesa, ¿cual fue su velocidad horizontal inicial?

Explanation:

The question, translated, is:

This is a projectile motion, for which, the equations that you will need are:

1. Calculate the time that it takes the ball to fall 4ft

2. Calculate the horizontal velocity:

f=ma newton

f=100x2.5=250n

r = ρ x length / area  

ρ = r x area / length  

ρ is in ohm-meters  

in basic units, it is m³kg/s³a²  

i think this is it.