The Figure Represents the Parabolic Trajectory of a Ball Going $\theta$

question 8

Multiple Choice

The figure represents the parabolic trajectory of a ball going from a to e in Earth gravity but without air resistance. The initial velocity of the ball is V_o at an angle $\theta$ to the horizon. The vertical dashed lines represent equal time interval, $\Delta$ t. Consider "up" as the positive direction. The vertical velocity at point b is [Note: g = 9.81 m/s²) ]

• A) 0.
• B) V_o cos \(\theta\)) - ½ g 2\(\Delta\)t)².
• C) V_o sin \(\theta\)) - ½ g 2\(\Delta\)t)².
• D) V_o sin\(\theta\)) + ½ g 2\(\Delta\)t)².
• E) V_o cos \(\theta\)) + ½ g 2\(\Delta\)t)².

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