# A projectile is launched from the earth’s sur- face at initial speed v0 at angle θ0 with the horizontal. When the projectile is at its max- imum height h, it has half the speed it had when it was at half its maximum height h. 2 At what angle was the projectile launched?

A projectile is launched from the earth’s sur- face at initial speed v0 at angle θ0 with the horizontal. When the projectile is at its max- imum height h, it has half the speed it had

when it was at half its maximum height h. 2

At what angle was the projectile launched?

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