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A projectile is launched straight up at 135 m/s. Determine how fast it is moving at the top of its trajectory (flight).
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A projectile is launched straight up at 135 m/s. Determine how fast it is moving at the top of its trajectory (flight).

User Strand McCutchen
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It is 0 m/s. At the very top of its flight is right between when it is going up and going down; this is the ephemeral moment when it is perfectly still.
User Bogdan Shahnitsky
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