Vera throws a golf ball upward with an initial speed of v1 = 7.5 m/s, releasing the ball from an initial height of h1 = 0.80 m. At the same moment that she releases it, her friend Anil drops another golfball from rest, directly above Vera's golfball and from an initial height of h2 = 6.5 m. The balls then collide. Ignoring air resistance, at what height hf above the ground does the collision occur? For the limits check, investigate what happens to hfas Vera's launch speed grows large (v1 ).

1) representation of the problem

2) initial equations

3) algebra work ( symbolise only. don't plug in any number yet.)

4) symbolic answer

5) unit check

6) limit check

a) as v1. what limit does hf approach?

b)why does the result make physical sense?