A cannon launches a cannonball with initial speed $v$ at an angle $\alpha$ above the horizontal. Which equation gives the maximum height $H$ attained?
- A$H = \frac{v\sin\alpha}{2g}$
- B$H = \frac{g\sin\alpha}{2v}$
- C$H = \frac{(v\sin\alpha)^2}{2g}$
- D$H = \frac{g^2\sin\alpha}{2v}$