Range · maximum height · flight time · trajectory

g = 9.81 m/s². Maximum range at α = 45° (for h₀ = 0). The horizontal velocity vₓ is constant; the vertical one decreases by g each second.
Projectile motion is a combination of uniform horizontal motion and uniformly varying vertical motion. The initial velocity is split into the components and .
For a launch from ground level ():
The greatest range is given by an angle of 45°. The calculator also handles a launch from a height (and horizontal projectile motion as ), and it draws the trajectory with the highest point marked.
Because the range depends on sin(2α), and that function reaches its maximum at 2α = 90°, i.e. α = 45° (for a launch from ground level).
It stays constant for the whole flight — no force acts horizontally (ignoring air resistance). Only the vertical component changes, slowed and then accelerated by gravity.
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