Question: Answer the following questions for projectile motion on level ground assuming negligible air resistance (the initial angle being neither 0 nor 90): (a) Is the

Answer the following questions for projectile motion on level ground assuming negligible air resistance (the initial angle being neither 0° nor 90°): 

(a) Is the acceleration ever zero?

(b) Is the acceleration ever in the same direction as a component of velocity?

(c) Is the acceleration ever opposite in direction to a component of velocity?

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