The image shows the trajectory of baseball, with four labelled positions A throu

Question

The image shows the trajectory of baseball, with four labelled positions A through D. Positions A and C are at the same height, position B is at the highest point of the trajectory, and position D is shortly before the player catches the ball. Neglect air resistance for this problem. Which one of the following statements is true?
The ball has zero acceleration at point B.
The ball has zero velocity at point B.
The vertical component of the velocity is the same at points A and C.
The horizontal component of the velocity is the same at points A and D.
The vertical component of the acceleration changes sign at point B

Positions B and D are 9 meters and 2.2 meters above the playing field, respectively. If the ball had a speed of 4.9 m/s in position B, what is its speed in position D? (in m/s)

Explanation / Answer

The horizontal component of the velocity is the same at points A and D

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