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A: So ,I tried these vx = v*cos(q) //q is the shooting angle, vx is the speed in horizontal direction

vy_0 = v*sin(q) //original vertical speed

vy = vy_0 - gt // the projectile is pulled down by the gravity

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x(t) = vxt

y(t) = vy_0t - 0.5gt^2

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when the projectile hits the ground, y is 0

vy_0t = 0.5gt^2

vy_0 = 0.5gt

t = 2vy_0/g

How do I relate these altogether to prove the Galileo thing? Please.