A couple of physics, a couple of physics questions 1 a cannonball is launched from the, Physics

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A couple of physics

A couple of Physics questions:

1: A cannonball is launched from the ground at an angle of 45 degrees above the horizontal and a speed of 45 m/s. With no air resistance, the ball will land on the ground with a speed of what?
2: a baseball is thrown straight up. At the top of it's path it's acceleration is what ?

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