Ball A is dropped from rest from a window. At the same instant, ball B is thrown

Question

Ball A is dropped from rest from a window. At the same instant, ball B is thrown downward; and ball C is throw upward from the same window. Which statement is true concerning the balls after their release disregarding air resistance?

A. All three balls have the same velocity at any instant
B. All three balls have the same acceleration at any instant
C. All three balls strike the ground at the same time
D. All three balls reach the ground with the same velocity
E.At some instant after it is thrown, the acceleration of ball C is zero

Explanation / Answer

Only B would be true, it is true because the acceleration is always equal to that of gravity. A is false as (for example) A has 0 initial velocity and B has some initial velocity downward. C is false as the ball thrown downward will definitely hit the ground before the others. D is false as the ball that is dropped (initial velocity 0) will have less velocity than the others. E is false for the reason B is true, the acceleration is always G

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