15. Una pelota de tenis situada a dos metros de altura es golpeada por un jugador con su raqueta. La pelota sale horizontalmente con una velocidad de 30 m/s.
a) ¿Cuánto tiempo tarda la pelota en llegar al suelo?
b) ¿Qué ángulo forma el vector velocidad con el eje x en el momento que la pelota alcanza
el suelo?
c) Si, antes del golpe, la pelota se encuentra a 5 m de la red, ¿a que altura pasa la pelota
sobre la red?

d) by the cross product property, ab^2 = bc multiplied by ad

step-by-step explanation:

we are given

in the given triangle abc

angle a is 90° and segment ad is perpendicular to segment bc

we can see that

triangle(abc) and triangle(abd) are similar because they have common side and same angle (90 degree)

so, triangles(abc) and abd are similar

since, they are similar

so, the ratio of their sides must be equal

we get

now, we can cross multiply

and we get

so, this could be step to prove it

it shoild be o

step-by-step explanation:

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c