a. Time
t = 2 vo sin (α)/ g
t = 2 ( 20.0 m/s) sin (60°) / 9.8 ms-²
t = 34.64 m/s / 9.8 ms -²
t = 3.53 s
b. Range and maximum height
Range or dx = vo²/ g sin 2(α)
dx = 20.0m/s² /(9.8) sin 2 (60°)
dx = 35.347 m ≈ 35.35 m
Maximum height or h = V₀² * sin(α)² / (2 * g)
h = (20.0)²sin (60°)² / (2)(9.8 m/s)
h = 15.290 m ≈ 15. 29 m
