Projectile Motion - motion on a horizontal surface plz help! 1. The problem statement, all variables and given/known data Isaac Newton shot a dirty snowball 76m across a horizontal field. It passed directly over Edmund Haley's head, and was in the air for 7.6s. How high did it get above the field? Answer in m. 2. Relevant equations Δd = V1(Δt) + 1/2(g)(Δt)^2 and i think some projectile motion equations, not sure if those will help. 3. The attempt at a solution since at maximum height the velocity will be zero i tried this: Δd = 0m/s(Δt) - 1/2(9.8m/s^2)(7.6s)^2 Δd = 283m but this is not the right answer, so i would appreciate it if someone could help me with this. Thank you.