Question

what is the acceleration of a projectile at the top of its projectery
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Answer 1

Answer:

If it were zero, the projectile would simply keep going in a straight line. However, gravity is still acting, pulling it down, and accelerating it towards the earth. Thus the acceleration at the top is still -9.8 m/s2, just as it's been all along.

Answer 2

acceleration= 0...

hope that it's helpful to you....