Un arquero lanza una flecha horizontalmente con una velocidad de 30 m/s. Considerando que el indio se encuentra sobre una torre y que
transcurren 3s desde que la Flecha sale del arco hasta que se clava en el suelo plano ubicado en la base de la Torre, determine:
a) La altura aproximada de la Torre (altura de disparo)
b) El alcance máximo (distancia horizontal medida desde la posición
de disparo hasta la posición final de la flecha)

Ayúdenme porfi):

Astudent throws a water balloon with speed v0 from a height h = 1.76 m at an angle θ = 21° above the horizontal toward a target on the ground. the target is located a horizontal distance d = 9.5 m from the student’s feet. assume that the balloon moves without air resistance. use a cartesian coordinate system with the origin at the balloon's initial position. (a) what is the position vector, rtarge t, that originates from the balloon's original position and terminates at the target? put this in terms of h and d, and represent it as a vector using i and j. (b) in terms of the variables in the problem, determine the time, t, after the launch it takes the balloon to reach the target. your answer should not include h. (c) create an expression for the balloon's vertical position as a function of time, y(t), in terms of t, vo, g, and θ. (d) determine the magnitude of the balloon's initial velocity, v0, in meters per second, by eliminating t from the previous two expressions.