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In a Fourth of July celebration, a firecracker is launched from ground level with an initial velocity of 25.1 m/s at 30.1 ^{} from the *vertical*. At its maximum height it explodes in a starburst into many fragments, two of which travel forward initially at 20.1 m/s at ^{}
50.1 ^{} with respect to the horizontal, both quantities measured *relative to the original firecracker just before it exploded*.

With what angles with respect to the horizontal do the two fragments initially move right after the explosion, as measured by a spectator standing on the ground?

Projectile Motion: Positive Launch

Projectile Motion: Positive Launch

Projectile Motion: Positive Launch

Projectile Motion: Positive Launch