What is the acceleration of a projectile at its highest point? What is the acceleration just before and after the point?

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Question:

What is the acceleration of a projectile at its highest point? What is the acceleration just before and after the point?

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Answer:Ignoring effects of air resistance, the acceleration of a projectile near the surface of the earth is -9.8 m/s².  This is true at all points along the trajectory.

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