Two balls are thrown from the top of a building. Ball 1 is thrown straight down, and ball 2 is thrown with the same speed, but upward at an angle θ with respect to the horizontal. Consider the motion of the balls after they are released. Which one of the following statements is true?
a. The acceleration of Ball 1 becomes larger and larger as it falls, because the ball is going faster and faster.
b. Ball 2 has an acceleration in both the horizontal and vertical directions, but Ball 1 has an acceleration only in the vertical direction.
c. The acceleration of Ball 2 decreases as it rises, becomes zero at the top of the trajectory, and then increases as the ball begins to fall toward the ground.
d. Both balls have the same acceleration at all times.
Answers: 3
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